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solmazmitok
solmazmitok
04.02.2022 06:06 •  Химия

Вводе массой 12г растворили соль массой 8г . определите массовую долю соли в данном растворе

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Ответ:
nikdelordp08m0z
nikdelordp08m0z
04.02.2022
W=М(в-ва)/М(р-ра)
W=8/20=0,4
4,4(23 оценок)
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Ответ:
бэйба123
бэйба123
04.02.2022

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.

4,6(78 оценок)
Ответ:
s1mple72
s1mple72
04.02.2022

Дур*

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