Предмет: Химия, автор: maxtaines

Найдите массу соли и воды , которые потребовались для приготовления раствора нитрата магния массой 120 г и массовой долей 5%?

Ответы

Автор ответа: Platinum15

0

w(Mg(NO3)2) = m(Mg(NO3)2 / m(раствора)
0.05 = x/120
x = 6 г - это нашли массу соли
120- х =114 г - нашли массу воды

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