December 2021 1 13 Report
1)Составьте уравнение реакций между раствором силиката калия и а) р-ром CaCl2 ; б) р-ром НСl ; в ) р-ром H3PO4
2)Рассчитайте массу углерода, который может восстановить медь из 28,8г оксида меди (1)
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