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Номер 4, страница 64 - гдз по химии 9 класс учебник Рудзитис, Фельдман
Авторы: Рудзитис Г. Е., Фельдман Ф. Г.
Тип: Учебник
Издательство: Просвещение
Год издания: 2019 - 2023
Цвет обложки: зелёный
ISBN: 978-5-09-113569-5
Допущено Министерством просвещения Российской Федерации
Популярные ГДЗ в 9 классе
Глава 4. Кислород и сера. Параграф 17. Характеристика кислорода и серы. Подумай, ответь, выполни... - номер 4, страница 64.
App\Models\Task {#1030 // resources/views/models/task/default.blade.php #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 651050 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "64" "field_page_end" => null "field_url" => "/9-klass/himiya/rudzitis-uchebnik/17-2-4" "field_display_title" => "4" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1037 #items: array:1 [ 0 => App\Models\Term {#1036 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 26 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "номер" "field_cases" => array:6 [ "field_accusative_case" => "номер" "field_creative_case" => "номером" "field_dative_case" => "номеру" "field_genitive_case" => "номера" "field_nominative_case" => "номер" "field_prepositional_case" => "номере" ] "field_short_name" => "№" ] #original: array:6 [ "id" => 26 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "номер" "field_cases" => array:6 [ "field_accusative_case" => "номер" "field_creative_case" => "номером" "field_dative_case" => "номеру" "field_genitive_case" => "номера" "field_nominative_case" => "номер" "field_prepositional_case" => "номере" ] "field_short_name" => "№" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1035 #items: [] #escapeWhenCastingToString: false } "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1046 #items: array:1 [ 0 => App\Models\Branch {#1045 #connection: "mysql" #table: "branches" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 650762 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Кислород и сера" "field_branch_order" => "4" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1050 #items: array:1 [ 0 => App\Models\Term {#1047 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:7 [ "id" => 29 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Глава" "field_cases" => array:6 [ "field_accusative_case" => "Главу" "field_creative_case" => "Главой" "field_dative_case" => "Главе" "field_genitive_case" => "Главы" "field_nominative_case" => "Глава" "field_prepositional_case" => "Главе" ] "field_page_check_not_needed" => null "field_short_name" => null ] #original: array:7 [ "id" => 29 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Глава" "field_cases" => array:6 [ "field_accusative_case" => "Главу" "field_creative_case" => "Главой" "field_dative_case" => "Главе" "field_genitive_case" => "Главы" "field_nominative_case" => "Глава" "field_prepositional_case" => "Главе" ] "field_page_check_not_needed" => null "field_short_name" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_page_start" => "61" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1081 #items: array:1 [ 0 => App\Models\Book {#1049 #connection: "mysql" #table: "books" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:50 [ "id" => 218 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_tree_default_status" => "tasks" "field_pages_status" => null "field_subject" => Illuminate\Database\Eloquent\Collection {#1051 #items: array:1 [ 0 => App\Models\Term {#1048 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:10 [ "id" => 6495 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Химия" "field_abbreviated_name" => null "field_cases" => array:6 [ …6] "field_foreign_lang_name" => null "field_short_name" => null "field_subject_type" => "technical_subject" "field_translit" => "himiya" ] #original: array:10 [ "id" => 6495 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Химия" "field_abbreviated_name" => null "field_cases" => array:6 [ …6] "field_foreign_lang_name" => null "field_short_name" => null "field_subject_type" => "technical_subject" "field_translit" => "himiya" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_class" => Illuminate\Database\Eloquent\Collection {#1052 #items: array:1 [ 0 => App\Models\Term {#1053 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 5458 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "9" "field_cases" => array:6 [ …6] "field_translit" => "devjatyj" ] #original: array:6 [ "id" => 5458 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "9" "field_cases" => array:6 [ …6] "field_translit" => "devjatyj" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_publisher" => Illuminate\Database\Eloquent\Collection {#1054 #items: array:1 [ 0 => App\Models\Term {#1055 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 5153 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Просвещение" "field_cases" => null "field_translit" => "prosveschenie" ] #original: array:6 [ "id" => 5153 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Просвещение" "field_cases" => null "field_translit" => "prosveschenie" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_author" => Illuminate\Database\Eloquent\Collection {#1056 #items: array:2 [ 0 => App\Models\Term {#1057 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:12 [ "id" => 5630 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Рудзитис" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Гунтис" "field_patronymic" => "Екабович" "field_surname_rp" => null ] #original: array:12 [ "id" => 5630 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Рудзитис" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Гунтис" "field_patronymic" => "Екабович" "field_surname_rp" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 1 => App\Models\Term {#1058 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:12 [ "id" => 6052 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Фельдман" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Фриц" "field_patronymic" => "Генрихович" "field_surname_rp" => null ] #original: array:12 [ "id" => 6052 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Фельдман" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Фриц" "field_patronymic" => "Генрихович" "field_surname_rp" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1059 #items: [] #escapeWhenCastingToString: false } "field_book_type" => Illuminate\Database\Eloquent\Collection {#1060 #items: array:1 [ 0 => App\Models\Term {#1061 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:10 [ "id" => 6671 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Учебник" "field_book_type_foreign" => null "field_cases" => array:6 [ …6] "field_plural_form" => null "field_short_name" => null "field_short_name_foreign" => null "field_translit" => "uchebnik" ] #original: array:10 [ "id" => 6671 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Учебник" "field_book_type_foreign" => null "field_cases" => array:6 [ …6] "field_plural_form" => null "field_short_name" => null "field_short_name_foreign" => null "field_translit" => "uchebnik" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_country" => Illuminate\Database\Eloquent\Collection {#1062 #items: array:1 [ 0 => App\Models\Term {#1063 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 9 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Россия" "field_cases" => array:6 [ …6] "field_translit" => "rossiya" ] #original: array:6 [ "id" => 9 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Россия" "field_cases" => array:6 [ …6] "field_translit" => "rossiya" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_city" => Illuminate\Database\Eloquent\Collection {#1064 #items: array:1 [ 0 => App\Models\Term {#1065 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 15 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Москва" "field_cases" => array:6 [ …6] "field_translit" => "moskva" ] #original: array:6 [ "id" => 15 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Москва" "field_cases" => array:6 [ …6] "field_translit" => "moskva" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_series" => Illuminate\Database\Eloquent\Collection {#1066 #items: [] #escapeWhenCastingToString: false } "field_umk" => Illuminate\Database\Eloquent\Collection {#1067 #items: [] #escapeWhenCastingToString: false } "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1068 #items: [] #escapeWhenCastingToString: false } "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1069 #items: array:1 [ 0 => App\Models\Term {#1070 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:10 [ "id" => 6706 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "ФГОС (старый)" "field_cases" => array:6 [ …6] "field_color" => null "field_end_year" => "2022" "field_start_year" => "2019" "field_translit" => "fgos-old" "field_type" => null ] #original: array:10 [ "id" => 6706 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "ФГОС (старый)" "field_cases" => array:6 [ …6] "field_color" => null "field_end_year" => "2022" "field_start_year" => "2019" "field_translit" => "fgos-old" "field_type" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_publication_number" => "9" "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1071 #items: array:1 [ 0 => App\Models\Term {#1072 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 33 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "стереотипное" "field_cases" => array:6 [ …6] "field_translit" => "stereotipnoe" ] #original: array:6 [ "id" => 33 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "стереотипное" "field_cases" => array:6 [ …6] "field_translit" => "stereotipnoe" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1073 #items: [] #escapeWhenCastingToString: false } "field_under_the_edition_degree" => null "field_cover_description" => null "field_publication_year" => "2019" "field_publication_year_until" => "2023" "field_part" => "" "field_part_writing" => "" "field_second_foreign_language" => null "field_for_whom" => null "field_allowed" => "Допущено Министерством просвещения Российской Федерации" "field_reserve_field" => null "field_link_to_source" => null "field_tasks_count" => "447" "field_priority" => "16" "field_default_folder" => "/himiya_09/rudzitis-u22/" "field_isbn" => "978-5-09-113569-5" "field_cover" => array:1 [ 0 => "/media/himiya_09/rudzitis-u22/covers/cover1.webp?ts=1738591831" ] "field_cover_alts" => array:1 [ 0 => "" ] "field_covers" => array:1 [ 0 => array:4 [ "path" => "/media/himiya_09/rudzitis-u22/covers/cover1.webp?ts=1738591831" "alt" => "" "width" => "699" "height" => "933" ] ] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1074 #items: [] #escapeWhenCastingToString: false } "field_new_book" => Illuminate\Database\Eloquent\Collection {#1075 #items: [] #escapeWhenCastingToString: false } "field_old_book" => Illuminate\Database\Eloquent\Collection {#1076 #items: [] #escapeWhenCastingToString: false } "field_url" => "/9-klass/himiya/rudzitis-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1077 #items: array:1 [ 0 => App\Models\Term {#1078 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 47 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "зелёный" "field_cases" => array:6 [ …6] "field_translit" => "zelyonyy" ] #original: array:6 [ "id" => 47 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "зелёный" "field_cases" => array:6 [ …6] "field_translit" => "zelyonyy" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => "<!--Текст в низу страницы--> <h2> Что поможет в освоении химии? </h2> <p> Девятиклассникам придется попотеть, чтобы добиться хороших результатов в учебе. Программа обучения становится в разы сложнее и объемнее. Кроме того, полным ходом идет подготовка к экзаменам. Не все школьники справляются с такими нагрузками. Многие, пытаясь сосредоточиться на нескольких задачах сразу, допускают повсюду промахи. Особенно сложно нагнать потом упущенные навыки по химии, так как эта наука весьма специфична. Поэтому лучше сразу предотвратить всякие недоразумения. Для этого достаточно воспользоваться справочником <strong>ГДЗ по Химии 9 класс Учебник Рудзитис, Фельдман (Просвещение, 2016 г.)</strong>. </p> <p> На девятом году обучения ученикам предстоит учить такие темы как: </p> <ol> <li>Окислительно-восстановительные реакции.</li> <li>Характеристика кислорода и серы.</li> <li>Сероводород. Сульфиды.</li> <li>Соли аммония.</li> <li>Фосфорная кислота и её соли.</li> <li>Химические свойства углерода. Адсорбция, и т.д.</li> </ol> <p> Основные сложности возникают с составлением уравнений реакций, так как некоторые учащиеся не могут запомнить, что именно для этого надо. На уроках они списывают все с доски и не особо задумываются над тем, каким образом учитель приходит тем или иным выводам. Неудивительно, что дома подростки не могут повторить все продемонстрированные в классе схемы. Решебник позволит им разобраться во всех деталях и без всяких трудностей решать заданные номера. </p> <h2> ГДЗ - лучшее решение проблем </h2> <p> Химия пригодится ученикам как для получения многих профессий, так и для решения бытовых вопросов. Это изначально кажется, что знать непростые соединения и вещества в принципе не обязательно, ведь у ребят нет осознания того, зачем именно они все это учат. Таким образом могут возникнуть многочисленные пробелы, которые помешают правильно воспринимать последующий материал. <strong>Решебник к учебнику по химии за 9 класс Рудзитис Г.Е., Фельдман Ф.Г. (ФГОС)</strong> позволит быстро и качественно освоить предмет. </p> <p> Используя справочник для систематических занятий, ученики получат возможность: </p> <ol> <li>улучшить качество домашних заданий;</li> <li>своевременно находить и устранять ошибки;</li> <li>тщательно разбирать непонятные темы;</li> <li>заранее готовиться к многочисленным проверочным испытаниям.</li> </ol> <p> Работать с решебником подростки могут в удобном для себя темпе, так как издание доступно онлайн и открыть его легко с любого гаджета, подключенного к Интернету. Уделяя тренировкам хотя бы несколько минут в день, отстающие от программы учащиеся не только нагонят одноклассников, но и продвинутся вперед, что обеспечит им хорошие оценки и похвалу учителя. </p> <h2> Ответы из решебника - надежная помощь </h2> <p> Хоть на уроках учителя и стараются всячески донести до своих подопечных все тематические нюансы, но по факту нужная информация откладывается в памяти очень небольшого процента ребят. Остальные же, садясь за выполнение д/з, впадают в ступор, так как не понимают, каким образом им действовать дальше. В <strong>сборнике ответов по химии 9 класс Рудзитиса</strong> ученики почерпнут все недостающие сведения и пояснения. </p> <p> Авторы пособия разместили в нем: </p> <ul> <li>верные ответы для быстрой сверки результатов;</li> <li>готовые решения, чтобы можно было понять, откуда взялись недочеты;</li> <li>наглядные примеры, чтобы осознать, что требуется делать;</li> <li>дополнительные примечания для разбора проблемных параграфов.</li> </ul> <p> С решебником учебный процесс станет более продуктивным, так как подростки смогут своевременно устранять пробелы и пополнять свои навыки. Но им стоит понимать, что обычным списыванием этого не добиться. Справочник стоит использовать только для самоконтроля и работы над ошибками. </p>" "breadcrumbs" => array:3 [ "class" => 380 "subject" => 558 "class_subject" => 499 ] ] #original: array:50 [ "id" => 218 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_tree_default_status" => "tasks" "field_pages_status" => null "field_subject" => Illuminate\Database\Eloquent\Collection {#1051} "field_class" => Illuminate\Database\Eloquent\Collection {#1052} "field_publisher" => Illuminate\Database\Eloquent\Collection {#1054} "field_author" => Illuminate\Database\Eloquent\Collection {#1056} "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1059} "field_book_type" => Illuminate\Database\Eloquent\Collection {#1060} "field_country" => Illuminate\Database\Eloquent\Collection {#1062} "field_city" => Illuminate\Database\Eloquent\Collection {#1064} "field_series" => Illuminate\Database\Eloquent\Collection {#1066} "field_umk" => Illuminate\Database\Eloquent\Collection {#1067} "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1068} "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1069} "field_publication_number" => "9" "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1071} "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1073} "field_under_the_edition_degree" => null "field_cover_description" => null "field_publication_year" => "2019" "field_publication_year_until" => "2023" "field_part" => "" "field_part_writing" => "" "field_second_foreign_language" => null "field_for_whom" => null "field_allowed" => "Допущено Министерством просвещения Российской Федерации" "field_reserve_field" => null "field_link_to_source" => null "field_tasks_count" => "447" "field_priority" => "16" "field_default_folder" => "/himiya_09/rudzitis-u22/" "field_isbn" => "978-5-09-113569-5" "field_cover" => array:1 [ 0 => "/media/himiya_09/rudzitis-u22/covers/cover1.webp?ts=1738591831" ] "field_cover_alts" => array:1 [ 0 => "" ] "field_covers" => array:1 [ 0 => array:4 [ "path" => "/media/himiya_09/rudzitis-u22/covers/cover1.webp?ts=1738591831" "alt" => "" "width" => "699" "height" => "933" ] ] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1074} "field_new_book" => Illuminate\Database\Eloquent\Collection {#1075} "field_old_book" => Illuminate\Database\Eloquent\Collection {#1076} "field_url" => "/9-klass/himiya/rudzitis-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1077} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => "<!--Текст в низу страницы--> <h2> Что поможет в освоении химии? </h2> <p> Девятиклассникам придется попотеть, чтобы добиться хороших результатов в учебе. Программа обучения становится в разы сложнее и объемнее. Кроме того, полным ходом идет подготовка к экзаменам. Не все школьники справляются с такими нагрузками. Многие, пытаясь сосредоточиться на нескольких задачах сразу, допускают повсюду промахи. Особенно сложно нагнать потом упущенные навыки по химии, так как эта наука весьма специфична. Поэтому лучше сразу предотвратить всякие недоразумения. Для этого достаточно воспользоваться справочником <strong>ГДЗ по Химии 9 класс Учебник Рудзитис, Фельдман (Просвещение, 2016 г.)</strong>. </p> <p> На девятом году обучения ученикам предстоит учить такие темы как: </p> <ol> <li>Окислительно-восстановительные реакции.</li> <li>Характеристика кислорода и серы.</li> <li>Сероводород. Сульфиды.</li> <li>Соли аммония.</li> <li>Фосфорная кислота и её соли.</li> <li>Химические свойства углерода. Адсорбция, и т.д.</li> </ol> <p> Основные сложности возникают с составлением уравнений реакций, так как некоторые учащиеся не могут запомнить, что именно для этого надо. На уроках они списывают все с доски и не особо задумываются над тем, каким образом учитель приходит тем или иным выводам. Неудивительно, что дома подростки не могут повторить все продемонстрированные в классе схемы. Решебник позволит им разобраться во всех деталях и без всяких трудностей решать заданные номера. </p> <h2> ГДЗ - лучшее решение проблем </h2> <p> Химия пригодится ученикам как для получения многих профессий, так и для решения бытовых вопросов. Это изначально кажется, что знать непростые соединения и вещества в принципе не обязательно, ведь у ребят нет осознания того, зачем именно они все это учат. Таким образом могут возникнуть многочисленные пробелы, которые помешают правильно воспринимать последующий материал. <strong>Решебник к учебнику по химии за 9 класс Рудзитис Г.Е., Фельдман Ф.Г. (ФГОС)</strong> позволит быстро и качественно освоить предмет. </p> <p> Используя справочник для систематических занятий, ученики получат возможность: </p> <ol> <li>улучшить качество домашних заданий;</li> <li>своевременно находить и устранять ошибки;</li> <li>тщательно разбирать непонятные темы;</li> <li>заранее готовиться к многочисленным проверочным испытаниям.</li> </ol> <p> Работать с решебником подростки могут в удобном для себя темпе, так как издание доступно онлайн и открыть его легко с любого гаджета, подключенного к Интернету. Уделяя тренировкам хотя бы несколько минут в день, отстающие от программы учащиеся не только нагонят одноклассников, но и продвинутся вперед, что обеспечит им хорошие оценки и похвалу учителя. </p> <h2> Ответы из решебника - надежная помощь </h2> <p> Хоть на уроках учителя и стараются всячески донести до своих подопечных все тематические нюансы, но по факту нужная информация откладывается в памяти очень небольшого процента ребят. Остальные же, садясь за выполнение д/з, впадают в ступор, так как не понимают, каким образом им действовать дальше. В <strong>сборнике ответов по химии 9 класс Рудзитиса</strong> ученики почерпнут все недостающие сведения и пояснения. </p> <p> Авторы пособия разместили в нем: </p> <ul> <li>верные ответы для быстрой сверки результатов;</li> <li>готовые решения, чтобы можно было понять, откуда взялись недочеты;</li> <li>наглядные примеры, чтобы осознать, что требуется делать;</li> <li>дополнительные примечания для разбора проблемных параграфов.</li> </ul> <p> С решебником учебный процесс станет более продуктивным, так как подростки смогут своевременно устранять пробелы и пополнять свои навыки. Но им стоит понимать, что обычным списыванием этого не добиться. 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App\Models\Book {#1049} ] #escapeWhenCastingToString: false } "branch_parent" => Illuminate\Database\Eloquent\Collection {#1126 #items: array:1 [ 0 => App\Models\Branch {#1045} ] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 650763 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Характеристика кислорода и серы" "field_branch_order" => "17" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1128} "field_page_start" => "61" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1127} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1126} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 2 => App\Models\Branch {#1129 #connection: "mysql" #table: "branches" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 650765 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Подумай, ответь, выполни..." "field_branch_order" => null "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1130 #items: [] #escapeWhenCastingToString: false } "field_page_start" => "64" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1131 #items: array:1 [ 0 => App\Models\Book {#1049} ] #escapeWhenCastingToString: false } "branch_parent" => Illuminate\Database\Eloquent\Collection {#1140 #items: array:1 [ 0 => App\Models\Branch {#1139 #connection: "mysql" #table: "branches" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 650763 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Характеристика кислорода и серы" "field_branch_order" => "17" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1141 #items: array:1 [ …1] #escapeWhenCastingToString: false } "field_page_start" => "61" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1142 #items: array:1 [ …1] #escapeWhenCastingToString: false } "branch_parent" => Illuminate\Database\Eloquent\Collection {#1143 #items: array:1 [ …1] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 650763 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Характеристика кислорода и серы" "field_branch_order" => "17" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1141} "field_page_start" => "61" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1142} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1143} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 650765 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Подумай, ответь, выполни..." "field_branch_order" => null "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1130} "field_page_start" => "64" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1131} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1140} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "content" => Illuminate\Database\Eloquent\Collection {#1108 #items: array:3 [ 0 => App\Models\Element {#1100 #connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:7 [ "id" => 806531 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1091 #items: array:1 [ 0 => App\Models\Edition {#1101 #connection: "mysql" #table: "editions" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ "id" => 1790 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Условие" "field_order" => "1" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1099 #items: array:1 [ …1] #escapeWhenCastingToString: false } "field_content_type" => "free" "field_content_mode" => "text, image" "field_page_content_mode" => "image" "field_content_text_checked" => null "field_page_content_text_checked" => "0" "field_solution_author" => "Автор" "field_moderator" => "pasha" "field_edition_type" => "statement" "field_root_dir" => "0-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1097 #items: [] #escapeWhenCastingToString: false } "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1096 …2} "field_process_formula" => "katex" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1095 …2} "field_content_source" => null ] #original: array:21 [ "id" => 1790 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Условие" "field_order" => "1" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1099} "field_content_type" => "free" "field_content_mode" => "text, image" "field_page_content_mode" => "image" "field_content_text_checked" => null "field_page_content_text_checked" => "0" "field_solution_author" => "Автор" "field_moderator" => "pasha" "field_edition_type" => "statement" "field_root_dir" => "0-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1097} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1096 …2} "field_process_formula" => "katex" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1095 …2} "field_content_source" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "651050" "type" => "task" ] "text" => "<p><strong>4.</strong> Известно соединение, содержащее $0,27928$ массовых долей, или $27,928 \, \%$, фосфора и $0,72072$ массовых долей, или $72,072 \, \%$, серы. Найдите его простейшую формулу.</p>" "img" => array:1 [ 0 => array:5 [ "name" => "4-1.jpg" "alt" => null "width" => "1604" "height" => 239 "path" => "/media/himiya_09/rudzitis-u22/0-17-2/4-1.webp?ts=1738739064" ] ] ] #original: array:7 [ "id" => 806531 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1091} "task" => array:2 [ "refs" => "651050" "type" => "task" ] "text" => "<p><strong>4.</strong> Известно соединение, содержащее $0,27928$ массовых долей, или $27,928 \, \%$, фосфора и $0,72072$ массовых долей, или $72,072 \, \%$, серы. Найдите его простейшую формулу.</p>" "img" => array:1 [ 0 => array:5 [ "name" => "4-1.jpg" "alt" => null "width" => "1604" "height" => 239 "path" => "/media/himiya_09/rudzitis-u22/0-17-2/4-1.webp?ts=1738739064" ] ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 1 => App\Models\Element {#1093 #connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 806591 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1083 #items: array:1 [ 0 => App\Models\Edition {#1094 #connection: "mysql" #table: "editions" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ "id" => 1791 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Решение" "field_order" => "2" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1089 …2} "field_content_type" => "free" "field_content_mode" => "image" "field_page_content_mode" => "" "field_content_text_checked" => "0" "field_page_content_text_checked" => "0" "field_solution_author" => "Ладыко (Торчило)" "field_moderator" => "pasha" "field_edition_type" => "solution" "field_root_dir" => "1-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1090 …2} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1088 …2} "field_process_formula" => "" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1085 …2} "field_content_source" => null ] #original: array:21 [ "id" => 1791 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Решение" "field_order" => "2" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1089 …2} "field_content_type" => "free" "field_content_mode" => "image" "field_page_content_mode" => "" "field_content_text_checked" => "0" "field_page_content_text_checked" => "0" "field_solution_author" => "Ладыко (Торчило)" "field_moderator" => "pasha" "field_edition_type" => "solution" "field_root_dir" => "1-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1090 …2} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1088 …2} "field_process_formula" => "" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1085 …2} "field_content_source" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "651050" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "4-1.jpg" "alt" => null "width" => "1923" "height" => 997 "path" => "/media/himiya_09/rudzitis-u22/1-17-2/4-1.webp?ts=1738739104" ] ] ] #original: array:6 [ "id" => 806591 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1083} "task" => array:2 [ "refs" => "651050" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "4-1.jpg" "alt" => null "width" => "1923" "height" => 997 "path" => "/media/himiya_09/rudzitis-u22/1-17-2/4-1.webp?ts=1738739104" ] ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 2 => App\Models\Element {#1087 #connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 1494276 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1111 #items: array:1 [ 0 => App\Models\Edition {#1086 #connection: "mysql" #table: "editions" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ "id" => 5461 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Решение 2" "field_order" => "3" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1080 …2} "field_content_type" => "free" "field_content_mode" => "text" "field_page_content_mode" => "" "field_content_text_checked" => null "field_page_content_text_checked" => "0" "field_solution_author" => "Gemini 2.5 Pro" "field_moderator" => "tolik" "field_edition_type" => "solution" "field_root_dir" => "2-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1082 …2} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1043 …2} "field_process_formula" => "katex" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1041 …2} "field_content_source" => null ] #original: array:21 [ "id" => 5461 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Решение 2" "field_order" => "3" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1080 …2} "field_content_type" => "free" "field_content_mode" => "text" "field_page_content_mode" => "" "field_content_text_checked" => null "field_page_content_text_checked" => "0" "field_solution_author" => "Gemini 2.5 Pro" "field_moderator" => "tolik" "field_edition_type" => "solution" "field_root_dir" => "2-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1082 …2} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1043 …2} "field_process_formula" => "katex" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1041 …2} "field_content_source" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "651050" "type" => "task" ] "text" => "<p><strong>Дано:</strong></p><p>Массовая доля фосфора, $w(P) = 0,27928$ (или 27,928 %)</p><p>Массовая доля серы, $w(S) = 0,72072$ (или 72,072 %)</p><p><strong>Найти:</strong></p><p>Простейшую формулу соединения ($P_xS_y$)</p><p><strong>Решение:</strong></p><p>Простейшая (эмпирическая) формула показывает соотношение атомов элементов в веществе. Это соотношение можно найти, определив соотношение количеств вещества (числа молей) каждого элемента в образце соединения.</p><p><strong>1.</strong> Для удобства расчетов примем массу соединения равной 100 г. В этом случае масса каждого элемента будет численно равна его массовой доле, выраженной в процентах.</p><p>Масса фосфора: $m(P) = 100 \text{ г} \cdot 0,27928 = 27,928 \text{ г}$</p><p>Масса серы: $m(S) = 100 \text{ г} \cdot 0,72072 = 72,072 \text{ г}$</p><p><strong>2.</strong> Найдем количество вещества (в молях) для каждого элемента, разделив массу элемента на его молярную массу. Используем точные значения молярных масс из периодической таблицы:</p><p>Молярная масса фосфора: $M(P) \approx 30,974 \text{ г/моль}$</p><p>Молярная масса серы: $M(S) \approx 32,065 \text{ г/моль}$</p><p>Количество вещества фосфора:</p><p>$n(P) = \frac{m(P)}{M(P)} = \frac{27,928 \text{ г}}{30,974 \text{ г/моль}} \approx 0,90166 \text{ моль}$</p><p>Количество вещества серы:</p><p>$n(S) = \frac{m(S)}{M(S)} = \frac{72,072 \text{ г}}{32,065 \text{ г/моль}} \approx 2,2477 \text{ моль}$</p><p><strong>3.</strong> Соотношение индексов $x$ и $y$ в формуле $P_xS_y$ равно соотношению количеств вещества фосфора и серы:</p><p>$x : y = n(P) : n(S) \approx 0,90166 : 2,2477$</p><p><strong>4.</strong> Чтобы получить простейшее целочисленное соотношение, разделим оба значения на наименьшее из них (на $0,90166$):</p><p>Для $x$ (фосфор): $\frac{0,90166}{0,90166} = 1$</p><p>Для $y$ (сера): $\frac{2,2477}{0,90166} \approx 2,4929$</p><p>Получаем соотношение $x : y \approx 1 : 2,4929$. Это значение очень близко к $1 : 2,5$ или $1 : \frac{5}{2}$.</p><p><strong>5.</strong> Чтобы привести соотношение к целым числам, умножим обе части на 2:</p><p>$x = 1 \cdot 2 = 2$</p><p>$y = 2,5 \cdot 2 = 5$</p><p>Таким образом, простейшее целочисленное соотношение атомов фосфора и серы в соединении составляет 2:5. Простейшая формула соединения - $P_2S_5$.</p><p><strong>Ответ:</strong> Простейшая формула соединения - $P_2S_5$.</p>" ] #original: array:6 [ "id" => 1494276 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1111} "task" => array:2 [ "refs" => "651050" "type" => "task" ] "text" => "<p><strong>Дано:</strong></p><p>Массовая доля фосфора, $w(P) = 0,27928$ (или 27,928 %)</p><p>Массовая доля серы, $w(S) = 0,72072$ (или 72,072 %)</p><p><strong>Найти:</strong></p><p>Простейшую формулу соединения ($P_xS_y$)</p><p><strong>Решение:</strong></p><p>Простейшая (эмпирическая) формула показывает соотношение атомов элементов в веществе. Это соотношение можно найти, определив соотношение количеств вещества (числа молей) каждого элемента в образце соединения.</p><p><strong>1.</strong> Для удобства расчетов примем массу соединения равной 100 г. В этом случае масса каждого элемента будет численно равна его массовой доле, выраженной в процентах.</p><p>Масса фосфора: $m(P) = 100 \text{ г} \cdot 0,27928 = 27,928 \text{ г}$</p><p>Масса серы: $m(S) = 100 \text{ г} \cdot 0,72072 = 72,072 \text{ г}$</p><p><strong>2.</strong> Найдем количество вещества (в молях) для каждого элемента, разделив массу элемента на его молярную массу. Используем точные значения молярных масс из периодической таблицы:</p><p>Молярная масса фосфора: $M(P) \approx 30,974 \text{ г/моль}$</p><p>Молярная масса серы: $M(S) \approx 32,065 \text{ г/моль}$</p><p>Количество вещества фосфора:</p><p>$n(P) = \frac{m(P)}{M(P)} = \frac{27,928 \text{ г}}{30,974 \text{ г/моль}} \approx 0,90166 \text{ моль}$</p><p>Количество вещества серы:</p><p>$n(S) = \frac{m(S)}{M(S)} = \frac{72,072 \text{ г}}{32,065 \text{ г/моль}} \approx 2,2477 \text{ моль}$</p><p><strong>3.</strong> Соотношение индексов $x$ и $y$ в формуле $P_xS_y$ равно соотношению количеств вещества фосфора и серы:</p><p>$x : y = n(P) : n(S) \approx 0,90166 : 2,2477$</p><p><strong>4.</strong> Чтобы получить простейшее целочисленное соотношение, разделим оба значения на наименьшее из них (на $0,90166$):</p><p>Для $x$ (фосфор): $\frac{0,90166}{0,90166} = 1$</p><p>Для $y$ (сера): $\frac{2,2477}{0,90166} \approx 2,4929$</p><p>Получаем соотношение $x : y \approx 1 : 2,4929$. Это значение очень близко к $1 : 2,5$ или $1 : \frac{5}{2}$.</p><p><strong>5.</strong> Чтобы привести соотношение к целым числам, умножим обе части на 2:</p><p>$x = 1 \cdot 2 = 2$</p><p>$y = 2,5 \cdot 2 = 5$</p><p>Таким образом, простейшее целочисленное соотношение атомов фосфора и серы в соединении составляет 2:5. Простейшая формула соединения - $P_2S_5$.</p><p><strong>Ответ:</strong> Простейшая формула соединения - $P_2S_5$.</p>" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "next" => array:2 [ "refs" => "651051" "type" => "task" ] "previous" => array:2 [ "refs" => "651049" "type" => "task" ] "book" => Illuminate\Database\Eloquent\Collection {#1104 #items: array:1 [ 0 => App\Models\Book {#1049} ] #escapeWhenCastingToString: false } "page" => Illuminate\Database\Eloquent\Collection {#1107 #items: array:1 [ 0 => App\Models\BookPage {#1042 #connection: "mysql" #table: "book_pages" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true 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#connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 1105596 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1134 …2} "book_page" => array:2 [ …2] "img" => array:1 [ …1] ] #original: array:6 [ "id" => 1105596 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1134 …2} "book_page" => array:2 [ …2] "img" => array:1 [ …1] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "next" => array:2 [ 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Illuminate\Database\Eloquent\Collection {#1236 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1237 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1238 …2} "content" => Illuminate\Database\Eloquent\Collection {#1241 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1247 …2} "page" => array:2 [ …2] ] #original: array:24 [ "id" => 651047 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "64" "field_page_end" => null "field_url" => "/9-klass/himiya/rudzitis-uchebnik/17-2-1" "field_display_title" => "1" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1235 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1236 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null "field_url" => "/9-klass/himiya/rudzitis-uchebnik/17-2-2" "field_display_title" => "2" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1239 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1246 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1248 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1244 …2} "content" => Illuminate\Database\Eloquent\Collection {#1243 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1261 …2} "page" => array:2 [ …2] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 2 => App\Models\Task {#1245 #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 651049 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "64" "field_page_end" => null "field_url" => "/9-klass/himiya/rudzitis-uchebnik/17-2-3" "field_display_title" => "3" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1242 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1260 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1262 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1258 …2} "content" => Illuminate\Database\Eloquent\Collection {#1257 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1275 …2} "page" => array:2 [ …2] ] #original: array:24 [ "id" => 651049 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "64" "field_page_end" => null "field_url" => "/9-klass/himiya/rudzitis-uchebnik/17-2-3" "field_display_title" => "3" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1242 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1260 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1262 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"field_display_title" => "4" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1256 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1274 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1276 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1272 …2} "content" => Illuminate\Database\Eloquent\Collection {#1270 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1273 …2} "page" => array:2 [ …2] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 4 => App\Models\Task {#1271 #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 651051 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "64" "field_page_end" => null "field_url" => "/9-klass/himiya/rudzitis-uchebnik/17-3-1" "field_display_title" => "1" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1284 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1285 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1286 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1363 …2} "content" => Illuminate\Database\Eloquent\Collection {#1356 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1355 …2} "page" => array:2 [ …2] ] #original: array:24 [ "id" => 651051 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "64" "field_page_end" => null "field_url" => "/9-klass/himiya/rudzitis-uchebnik/17-3-1" "field_display_title" => "1" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1284 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1285 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1286 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1363 …2} "content" => Illuminate\Database\Eloquent\Collection {#1356 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1355 …2} "page" => array:2 [ …2] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 5 => App\Models\Task {#1322 #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 651052 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "64" "field_page_end" => null "field_url" => "/9-klass/himiya/rudzitis-uchebnik/17-3-2" "field_display_title" => "2" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1370 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1354 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1353 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1360 …2} "content" => Illuminate\Database\Eloquent\Collection {#1361 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1339 …2} "page" => array:2 [ …2] ] #original: array:24 [ "id" => 651052 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "64" "field_page_end" => null "field_url" => "/9-klass/himiya/rudzitis-uchebnik/17-3-2" "field_display_title" => "2" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1370 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1354 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1353 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1360 …2} "content" => Illuminate\Database\Eloquent\Collection {#1361 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1339 …2} "page" => array:2 [ …2] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 6 => App\Models\Task {#1326 #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 651053 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "64" "field_page_end" => null "field_url" => "/9-klass/himiya/rudzitis-uchebnik/17-3-3" "field_display_title" => "3" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1357 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1342 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1340 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1343 …2} "content" => Illuminate\Database\Eloquent\Collection {#1344 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1358 …2} "page" => array:2 [ …2] ] #original: array:24 [ "id" => 651053 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "64" "field_page_end" => null "field_url" => "/9-klass/himiya/rudzitis-uchebnik/17-3-3" "field_display_title" => "3" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1357 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1342 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1340 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1343 …2} "content" => Illuminate\Database\Eloquent\Collection {#1344 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1358 …2} "page" => array:2 [ …2] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } ] #original: array:21 [ "id" => 931204 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "64" "field_url" => "/9-klass/himiya/rudzitis-uchebnik/page-64" "field_display_title" => "64" "field_folder" => "1" "field_image_name" => "64" "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1040} "field_weight" => "0" "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1034} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "edition_groups" => Illuminate\Database\Eloquent\Collection {#1039} "content" => Illuminate\Database\Eloquent\Collection {#1136} "next" => array:2 [ "refs" => "931205" "type" => "book_page" ] "previous" => array:2 [ "refs" => "931203" "type" => "book_page" ] "tasks" => Illuminate\Database\Eloquent\Collection {#1220} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 651050 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "64" "field_page_end" => null "field_url" => "/9-klass/himiya/rudzitis-uchebnik/17-2-4" "field_display_title" => "4" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1037} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1035} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1046} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1110} "content" => Illuminate\Database\Eloquent\Collection {#1108} "next" => array:2 [ "refs" => "651051" "type" => "task" ] "previous" => array:2 [ "refs" => "651049" "type" => "task" ] "book" => Illuminate\Database\Eloquent\Collection {#1104} "page" => array:2 [ "refs" => "931204" "type" => "book_page" ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] }
№4 (с. 64)
Условие. №4 (с. 64)
скриншот условия
4. Известно соединение, содержащее $0,27928$ массовых долей, или $27,928 \, \%$, фосфора и $0,72072$ массовых долей, или $72,072 \, \%$, серы. Найдите его простейшую формулу.
Решение. №4 (с. 64)
Решение 2. №4 (с. 64)
Дано:
Массовая доля фосфора, $w(P) = 0,27928$ (или 27,928 %)
Массовая доля серы, $w(S) = 0,72072$ (или 72,072 %)
Найти:
Простейшую формулу соединения ($P_xS_y$)
Решение:
Простейшая (эмпирическая) формула показывает соотношение атомов элементов в веществе. Это соотношение можно найти, определив соотношение количеств вещества (числа молей) каждого элемента в образце соединения.
1. Для удобства расчетов примем массу соединения равной 100 г. В этом случае масса каждого элемента будет численно равна его массовой доле, выраженной в процентах.
Масса фосфора: $m(P) = 100 \text{ г} \cdot 0,27928 = 27,928 \text{ г}$
Масса серы: $m(S) = 100 \text{ г} \cdot 0,72072 = 72,072 \text{ г}$
2. Найдем количество вещества (в молях) для каждого элемента, разделив массу элемента на его молярную массу. Используем точные значения молярных масс из периодической таблицы:
Молярная масса фосфора: $M(P) \approx 30,974 \text{ г/моль}$
Молярная масса серы: $M(S) \approx 32,065 \text{ г/моль}$
Количество вещества фосфора:
$n(P) = \frac{m(P)}{M(P)} = \frac{27,928 \text{ г}}{30,974 \text{ г/моль}} \approx 0,90166 \text{ моль}$
Количество вещества серы:
$n(S) = \frac{m(S)}{M(S)} = \frac{72,072 \text{ г}}{32,065 \text{ г/моль}} \approx 2,2477 \text{ моль}$
3. Соотношение индексов $x$ и $y$ в формуле $P_xS_y$ равно соотношению количеств вещества фосфора и серы:
$x : y = n(P) : n(S) \approx 0,90166 : 2,2477$
4. Чтобы получить простейшее целочисленное соотношение, разделим оба значения на наименьшее из них (на $0,90166$):
Для $x$ (фосфор): $\frac{0,90166}{0,90166} = 1$
Для $y$ (сера): $\frac{2,2477}{0,90166} \approx 2,4929$
Получаем соотношение $x : y \approx 1 : 2,4929$. Это значение очень близко к $1 : 2,5$ или $1 : \frac{5}{2}$.
5. Чтобы привести соотношение к целым числам, умножим обе части на 2:
$x = 1 \cdot 2 = 2$
$y = 2,5 \cdot 2 = 5$
Таким образом, простейшее целочисленное соотношение атомов фосфора и серы в соединении составляет 2:5. Простейшая формула соединения - $P_2S_5$.
Ответ: Простейшая формула соединения - $P_2S_5$.
Другие задания:
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