A

2K+Cl2=2KCl

2H2O=2H2+O2

4P+3O2=2P2O3

2Na+S=Na2S

Б

2Na+Br2=2NaBr

2Mg+O2=2MgO

3Fe+2O2=Fe3O4

2Al+3S=Al2S3

B

2Al+3Cl2=2AlCl3

N2+3H2=2NH3

4Al+3O2=2Al2O3

2Cu+O2=2CuO