Предмет: Химия, автор: daun444daun

помогите пж срочно быстро

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Автор ответа: PegeJ

0

m(CuSO4)=25×0,1=2,5г

m(H2O)=25-2,5=22,5

m(ppa)=400+20=420г

w(соли)=20:420≈0,0476=4,76%

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