Предмет: Химия, автор: AlkudSabrina

Обчисли масу етанолу (г), який витратився під час взаємодії з 354,2 г натрію.

Ответы

Автор ответа: dyexfnf
0

Ответ:

Объяснение:

Дано :

m(Na) = 354,2 г

Найти : m(C2H5OH) - ?

Складемо РХР:

х г                  354,2 г

2C2H5OH   +   2Na   =  2C2H5ONa + H2

n = 2 моль        n = 2 моль

M = 46 г/моль  М = 23 г/моль

m = 92 г           m = 46 г

m(C2H5OH) = 354,2 * 92 : 46 = 708,4 г

Автор ответа: dobriakua
0

Дано:

m(Na) = 354,2 г

Знайти:

m(C2H5OH) - ?

Розв'язання:

1) 2C2H5OH + 2Na → 2C2H5ONa + H2;

2) n(Na) = m / M = 354,2 / 23 = 15,4 моль;

3) n(C2H5OH) = n(Na) = 15,4 моль;

4) m(C2H5OH) = n * M = 15,4 * 46 = 708,4 г.

Відповідь: Маса C2H5OH становить 708,4 г.

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