2Ca+O2=2CaO S+O2=SO2 H2+Cl2=2HCl 2Na+S=Na2S 2Al+3S=Al2S3 2Cr+3Cl2=2CrCl3 2SO2+O2=2SO3 2Fe2O3+3C=4Fe+3CO2
2Ca+O2=2CaO S+O2=SO2 H2+Cl2=2HCl 2Na+S=Na2S 2Al+3S=Al2S3 2Cr+3Cl2=2CrCl3 2SO2+O2=2SO3 2Fe2O3+3C=4Fe+3CO2