September 2021 0 14 Report
Какое из уравнений соответствует  реакции обмена: 1)Mg+CuSO4=MgSO4+Cu
2)CaO+CO2=CaCo3
3)AgNO3+AgCl+NaNO3
4)Zn(OH)2-ZnO+H2O
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