\(\begin{gathered} 2{H_2}O\xrightarrow[{MN}]{{DP}}2{H_2} + {O_2} \hfill \\ 3{H_2} + {N_2}\underset{{}}{\overset{{t,p,xt}}{\longleftrightarrow}}2N{H_3} \hfill \\ {N_2} + {O_2}\xrightarrow[{ho\,quang\,dien}]{{3000C}}2NO \hfill \\ 2NO + {O_2}\xrightarrow{{}}2N{O_2} \hfill \\ 4N{O_2} + {O_2} + 2{H_2}O\xrightarrow{{}}4HN{O_3} \hfill \\ HN{O_3} + N{H_3}\xrightarrow{{}}N{H_4}N{O_3} \hfill \\ \end{gathered} \)