Chemistry, 03.12.2020 14:00 mobslayer88

1. Din 800 grame soluţie de concentraţie 20% se evaporă 200 grame apă. Ce concentraţie procentuală va avea noua soluţie obţinută?

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1. Din 800 grame soluţie de concentraţie 20% se evaporă 200 grame apă. Ce concentraţie procentuală...

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