Предмет: Химия, автор: krystal2

какова массовая доля веществ в растворе, если для его приготовления взят нитрат калия массой 4 г и вода массой 21 г

Ответы

Автор ответа: vipmaster2011

9

w(ра-ра)=m(ве-ва)/m(ра-ра)*100=4/21+4*100=16%

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