N2 -> NH3 -> NH4OH -> NH4Cl -> NH3 -> (NH4)2SO4
N2+H3=2NH3
NH3+H2O=NH4OH
NH4OH+HCL=NH4CL+H2O
NH4CL+NaOH=NaCL+H2O+NH3
2NH3+H2SO4=(NH4)2SO4