nMg = 10.8/24 = 0.45 (mol)
mO2 = 13.2 - 10.8 = 2.4 (g) => nO2 = 0.075 (mol)
\(\left\{{}\begin{matrix}NO:30\\N_2O:44\end{matrix}\right.36\rightarrow\left\{{}\begin{matrix}8\\6\end{matrix}\right.-\frac{4}{3}\)
nhh khí = 1.568/22.4 = 0.07 (mol)
Suy ra: nNO = 0.04 mol, nN2O = 0.03 mol
Ta có: 0.45x2 = 0.075x4 + 0.04x3 + 0.03x8 + 8nNH4+ => nNH4+ = 0.03 mol
-> m = 10.8 + 62.(0.03x8 + 0.04x3 + 0.03x8 + 4x0.075) + 0.03x80 = 69g