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Smort
Smort
11.07.2020 03:30 •  Химия

Закончите уравнение реакции в молекулярном полным и кратком виде zn cl2 + ca(oh)2

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Ответ:
Maksim777900
Maksim777900
16.01.2022 06:50

Дур*

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Must Waste More Time...

0,0(0 оценок)
Ответ:
elka1245
elka1245
12.06.2022 01:57

CIVII20II7

Объяснение:

определим валентность хлора в его соединении с кислородом — Cl2O7.

 

1. Записываем известную валентность кислорода над формулой. Неизвестную валентность обозначаем буквой x:

 

Clx2OII7.

 

2. Находим сумму единиц валентности каждого элемента. Для этого его валентность умножаем на число атомов:

 

x⋅2=2⋅7.

 

3. Вычисляем x:

 

2x=14,x=14:2=7.

 

Валентность хлора равна VII:

 

ClVII2OII7.

Составление формулы бинарного соединения по валентностям химических элементов

Если известны валентности двух элементов, то можно составить формулу их соединения.

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