Химические свойства окида углерода(4), оксид серы(6), аммиака, оксид серы(4)?

1) CO2 + H2O = H2CO3                            2) SO3 + H2O = H2SO4    CO2 + 2NaOH = Na2CO3 + H2O              SO3 + 2NaOH = Na2SO4 + H2O    CO2 + CaO = CaCO3                                SO3 + Na2O = Na2SO4   CO2 + C = 2CO                                        3) NH3 + HCl = NH4Cl   CO2 + Mg = 2MgO + C                                 NH3 + H2O = NH4OH4) SO2 +H2O = H2SO3   SO2 + 2NaOH = Na2SO3 + H2O   SO2 + Na2O = Na2SO3