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какую массу соли можно получить в реакции цинка массой 6.5 г с соляной кислотой
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Предмет:
Химия -
Автор:
miriamdbju - 6 лет назад
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Ответы 1
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Дано:m (Zn) = 6.5гНайти:m (ZnCl2) - ?Решение:Zn + 2HCl = ZnCl2 + H2n (Zn) = m/M = 6.5 / 65 = 0.1 мольn (ZnCl2) = n (Zn) = 0.1 моль (по уравнению)m (ZnCl2) = n * M = 0.1 * 136 = 13.6гОтвет: m (ZnCl2) = 13.6г
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Автор:
alena83 - 6 лет назад
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1. Compared to other large cities, St.Petersburg is a mere youngster, only 92 years older than Washington. Peter the Great founded the city on the 16th of May, 1703. Ten years later St.Petersburg consisted only of an island fortress and some buildings which stretched out along the banks of the river Neva.
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