1) 2NO + O2 -> 2NO2
4Fe + 3O2 -> 2Fe2O3
2Zn + O2 -> 2ZnO
2Na + Cl2 -> 2NaCl
2Na + S -> Na2S
2Al + 6HCl -> 2AlCl3 +3 H2
2K + S -> K2S
H2 + Br2 -> 2HBr
2NH3 -> N2 + 3H2
Zn + Br2 -> ZnBr2
2Al + Fe2O3 -> Al2O3 +2Fe
2) 4 Al +3 O2 -> 2Al2O3
4Li + O2 -> 2Li2O
S + O2 -> SO2
4P + 5O2 ->2 P2O5
4Fe +3 O2 -> 2Fe2O3