Предмет: Химия, автор: ДианааЛис

Помогите пожалуйста срочно

1.Рассчитайте массу и количество вещества водорода, необходимого для реакции с 32 г кислорода

2. Дописать уравнения реакций, определить тип реакции:
Fe+O2→Fe(валентность lll)О
MgO+H2O→Mg(OH)2
Cu(OH)2→CuO+H2O

Приложения:

Ответы

Автор ответа: laiked
0

1)m=? n=?              3 2 г                                         Дано:  m(O2) = 32 г

 2Сa     +             O2      =   2CaO                                  М(Са) = 40 г/моль

n=2 моль          n= 1 моль                                             М(О2) = 32 г/моль

М=40 г/моль    М= 32 г/моль                              Найти: m(Ca) = ?

m= 80 г            m= 32 г                                                    n(Ca) =?

Х г Са        -    32 г О2

80 г Са     -     32 г О2

m(Ca) = 80 *32 | 32 = 80 г

Х моль Са       -    32 г О2

2 моль Са       -     32 г О2

n(Ca) = 2 *32 / 32 = 2 моль

Автор ответа: laiked
0
под 2ca пиши n=2 моль
Автор ответа: laiked
0
а под o2 n=1моль
Автор ответа: laiked
0
пиши под 2ca n=2моль M=40г/моль m+80г
Автор ответа: laiked
0
а под o2 пиши n=1 моль M=32г/моль m=32u
Автор ответа: laiked
0
и там потом всё ясно
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