что является овр HgO = Hg + O2 Fe + Cl2 = FeCl3 Ba(NO3)2 + K2CO3 = KNO3 + BaCO3 CO + O2 = CO2 Al2O3 + Mg = MgO + Al NaOH + H2SO4 = Na2SO4 + H2O Cu(OH)2 = CuO + H2O
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