July 2022 1 25 Report
ПОМОГИТЕ С ХИМИЕЙ ! ДАЮ 90 БАЛЛОВ !!!!! Какой объем воды надо взять для растворения 27,8 грамм гептагидрата сульфата железа (2) для получения раствора с w(FeSO4)= 8%? Какую массу кристаллогидрата следует добавить к этому раствору ,чтобы w(FeSO4) возросла на 15%?
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