Предмет: Химия, автор: Аноним

1. Вычислить массовые доли элементов в аммиачной селитре (азотное удобрение) NH4NO3

дано разрешении

2. Красный цвет рубина, золотисто-зеленый цвет изумруда предоставляет соединение, состоящее из двух элементов-Хром и кислорода. В образце вещества массой 30, 4 г содержится 9,6 г кислорода. Найдите содержание хрома. Ответ дайте в виде обыкновенной дроби.

дано разрешении

3. В какой массе сернистого газа SO2 содержится 16 кг кислорода?

дано разрешении

Ответы

Автор ответа: Биохимчик

1)массовая доля аммиачной селитры=80

w(N)=28/80=0.35=35%

w(O)=48/80=0.6=60%

w(H)=4/80=0.05=5%

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