Ruslan Zarekovkin
?>

Сколько граммов составляет 0.5 моль газа плотность которого 2.5? ​

Химия

Ответы

Yurevich1291

объем будет равен V = n * Vm = 0.5 *22.4 = 11.2 л  

ну а дальше массу мы легко найдем, умножив плотность на объем  

m = 11.2*2.5 = 28 г

Объяснение:

Pokupatel
Из формулы v(г)=V(г)/Vэт
выразим:
V(г)=v(г)*Vэт (1)
где v-количество вещества, V-объём, Vэт-объём эталона она постоянна для газов 22,4 л/моль.
Выразим объём из формулы плотности:
V=m/p (2)
подставляя выражение 2 в выражение 1 получаем:
m/p=v(г)*Vэт
находим массу:
m=v(г)*Vэт*p=0,5 моль*22,4 л/моль*2,5 г/л. = 28 г.
kuziv31

Дур*

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Must Waste More Time...

Maksim Dmitrii1579

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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Сколько граммов составляет 0.5 моль газа плотность которого 2.5? ​
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