2Cu+O2=2CuO
Mg+2HCl=MgCl2+H2
2Al(OH)3=Al2O3+3H2O
2Na+S=Na2S
2Fe(OH)3=Fe2O3+3H2O
2Na+Cl2=2NaCl
Zn+2HCl=ZnCl2+H2
H2+Cl2=2HCl
2Cu+O2=2CuO
Mg+2HCl=MgCl2+H2
2Al(OH)3=Al2O3+3H2O
2Na+S=Na2S
2Fe(OH)3=Fe2O3+3H2O
2Na+Cl2=2NaCl
Zn+2HCl=ZnCl2+H2
H2+Cl2=2HCl