Уравняйте хим.реакции:
а) МnO+O2--- Mn2O2
б) BaCO2--- BaO+CO2
в) СuO+H2SO2--- CuSO4+H2O
г) N2+H2--- NH2
д) H2S+O2--- S+H2O
е) Al+HCl--- AlCl2 +H2
ж) HNO2--- H2O+NO2+O2
з) NaOH+Cu(NO2)2--- Cu(OH)2+NaNO3
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