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sashasamyonov
@sashasamyonov
July 2022
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к 185 мл 80%-ного водного раствора этанола (плотность раствора 0.85 г/мл) добавил 188.6 мл H2O. найдите массовую долю в % спирта в конечном растворе
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Paulliness
M р-ра=185х0,85=131,75mспирта=0,8х131,75=105,4W=105,4:(131,75+188,6)=0,3310,331х100%= 33,1%
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