Li+O2= Zn+O2= Al+CL= Al+S= K+H2O= Fe +H2O= Ca +H2O= Zn+H2SO4= Fe+CuSo4= Al+HCL= Na+N2= Ca+O2=
4Li+O2=2Li2O 2Zn+O2=2ZnO 2Al+3Cl2=2AlCl3 2Al+S=Al2S 2K+2H2O=2KOH+H2 Fe+H2O=FeO+H2 Ca+2H2O=Ca(OH)2+H2 Zn+H2SO4=ZnSO4+H2 Fe+CuSO4=FeSO4+Cu 2Al+6HCl=2AlCl3+3H2 2Na+3N2=2NaN3 2Ca+O2=2CaO