2Ca+O2=2CaO
CaO+H2O=Ca(OH)2
C+O2=CO2
CO2+H2O=H2CO3
2Cu+O2=2CuO
2Na + 2HCl=2NaCl + H2
NO2+K=KNO2
2BaO+2SO2+O2= BaSO4
SO2+2NaOH= Na2SO3+H2O
CaO+CO2=CaCO3
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2Ca+O2=2CaO
CaO+H2O=Ca(OH)2
C+O2=CO2
CO2+H2O=H2CO3
2Cu+O2=2CuO
2Na + 2HCl=2NaCl + H2
NO2+K=KNO2
2BaO+2SO2+O2= BaSO4
SO2+2NaOH= Na2SO3+H2O
CaO+CO2=CaCO3