Предмет: Химия, автор: katyavysochenko

Вычислите массовую долю цинка в цинковом купоросе (ZnSo4*7H2O)

Ответы

Автор ответа: dec77cat
0
M(ZnSO₄*7H₂O)=287,557 г/моль молярная масса цинкового купороса
M(Zn)=65,390 г/моль  молярная масса цинка

массовая доля цинка
w(Zn)=M(Zn)/M(ZnSO₄*7H₂O)

w(Zn)=65,390/287,557=0,2274 (22,74%)
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