Предмет: Физика, автор: 9txvtwkyk2

Задание на фото класс пж

Приложения:

Ответы

Автор ответа: kristi249948

1

Ответ: Б) там конечно и по другому можно но так то по любому , Б

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Test

1. Read a sentence and then write another sentence with the same meaning. Begin each sentence as shown.

Model: Somebody stole my bag in the shop. My bag was stolen in the shop.

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Предмет: Химия, автор: disourugs

помогите решить: Практическая работа

Карбоновые кислоты и их свойства

Вариант-1

1.Охарактеризуйте карбоновую кислоту HOOC - СН2 - СН2- СН2 - COOH по следующим критериям:

• по числу карбоксильных групп ( одноосновная, двухосновная, многоосновная)

• по природе радикала (предельные, непредельные, ароматические)

• по содержанию атомов углерода (С1-С9 низшие карбоновые кислоты, С10 и более, высшие карбоновые кислоты)

Например: СH3 – СН2 – СН2 – СН2 - COOH Одноосновная, предельная , низшая карбоновая кислота.

2.Назовите карбоновую кислоту: СН3 – СН – СН – СН2 - СООН

│ │

СН3 С2Н5

3. Составьте структурную формулу, одноосновной карбоновой кислоты :

3 – этилгексановая кислота.

4.Охарактеризуйте химические свойства карбоновой кислоты:

СН3 – СН2 – СН2 - СН2 - СООН, т.е. составьте уравнения реакций указанной карбоновой кислоты с : Zn, CaO, Cu(OH)2 , C2H5OH.

7 лет назад