Em tham khảo nha:
\(\begin{array}{l}
2)\\
29Al + 108HN{O_3} \to 29Al{(N{O_3})_3} + 9NO + 6{N_2} + 54{H_2}O\\
29 \times |Al \to A{l^{ + 3}} + 3e\\
3 \times |{N^{ + 5}} + 29e \to 3NO + 2{N_2}\\
3)\\
(a + 3b)FeO + (4a + 10b)HN{O_3} \to (a + 3b)Fe{(N{O_3})_3} + aN{O_2} + bNO + (2a + 5b){H_2}O\\
(a + 3b) \times |F{e^{ + 2}} \to F{e^{ + 3}} + 1e\\
1 \times |{N^{ + 5}} + (a + 3b) \to aN{O_2} + bNO
\end{array}\)