2Na+Cl2-->2NaCl
2Ag+S-->Ag2S
2Mg+O2-->2MgO
2Al2O3-->4Al+3O2
3H2+N2-->2NH3
3C+Fe2O3-->2Fe+3CO
2KCl+F2-->2KF+Cl2
2NaBr+Ag2SO4-->Na2SO4+2AgBr
Fe2O3+6HCl-->2FeCl3+3h2O
2Al+3CuSO4-->Al2(SO4)33+3Cu
4P+5O2-->2P2O5
2Al+3H2SO4-->Al2(SO4)3+3H2
2SrBr+(NH4)2CO3-->SrCO3+2NH4Br
2C2H6+7O2-->4CO2+6H2O
3Fe+2O2-->Fe3O4