September 2021 0 5 Report
Помогите пожалуйста! Некоторую массу сульфида железа (||) обработали мзбытком соляной кислоты. Полученный газ в реакции с 12,5 мл раствора NaOH (w=25%, p=1,4г/мл) образовал кислую соль. Найдите массу исхожного сульфида железа.
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