Из указанного перечня выберите все реакции обмена:
CaO+2HCl = CaCl2 + H20
NH4NO2 = N2 + 2H2O
Fe + 2HCl = FeCl2 + H2
AgNO3 + NaCl = NaNO3 + AgCI
3H2 + N2 = 2NH3
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