July 2022 1 9 Report
В схеме превращений H2SO4 X1→  K2SO4 X2→  CaSO4 веществами X1 и X2 являются соответственно   1) KOH  и  CaCO3   2) KCl  и  Ca3(PO4)2   3) KCl  и  CaO   4) KOH  и  CaCl2
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