H2+Cl2=>2HCl

2Ca+O2=>2CaO

2CuO+C=>CO2+2Cu

Li2O+H2O=>2LiOH

2NO+O2=>2NO2

2Al+3I2=>2AlI3

C+O2=>CO2

2K+S=>K2S

2NaCl+F2=>2NaF+Cl2

2Fe+3Cl2=>2FeCl3

Fe2O3+3H2=>2Fe+3H2O