Предмет: Химия, автор: joiii

Для получения водорода с помощью цинка израсходовали 400г 9,8 %-й серной кислоты. Масса цинка, вступившего в реакцию равна (в г.)???????

Ответы

Автор ответа: Аленка19

Zn+H2SO4=ZnSO4+H2

m(H2SO4)=400*9,8%=39,2г

n(H2SO4)=39,2/98=0,4моль

n(Zn)=n(H2SO4)=0,4

m(Zn)=65*0,4=26

Ответ: 26 г

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