Какое уравнение соответствует реакции соединения? 1)CO2 + C = 2CO
2)2H2S + 3O2 = 2SO2 + 2H2O
3)2HCl + Ca(OH)2 = CaCl2 + 2H2O
4)Zn + 2HCl = ZnCl2 + H2↑
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