- TN1:
\(n_{H2}=0,63\left(mol\right)\)
Gọi a là mol Al, b là mol Mg
Bảo toàn e: \(3a+2b=0,63.2=1,26\left(1\right)\)
Tỉ lệ m 1:1 \(\Rightarrow27a-24b=0\left(2\right)\)
\(\left(1\right)+\left(2\right)\Rightarrow\left\{{}\begin{matrix}a=0,24\\b=0,27\end{matrix}\right.\)
- TN2:
\(\overline{M_A}=20,25.2=40,5\)
Gọi x là mol NO, y là mol N2O
\(\Rightarrow\frac{30x+44y}{x+y}=40,5\)
\(\Rightarrow10,5x-3,5y=0\left(3\right)\)
\(n_A=0,16\left(mol\right)\Rightarrow x+y=0,16\left(4\right)\)
\(\left(3\right)+\left(4\right)\Rightarrow\left\{{}\begin{matrix}x=0,04\\y=0,12\end{matrix}\right.\)
n e nhường= 3nAl+ 2nMg= 1,26 mol
n e nhận= 2nNO+ 8nN2O= 1,04 mol
\(N^{+5}+8e\rightarrow N^{-3}\)
\(\Rightarrow n_{NH4NO3}=\frac{1,26-1,04}{8}=0,0275\left(mol\right)\)
nHNO3 = 3nAl(NO3)3 + 2nMg(NO3)2 + nNO + 2nN2O + nNH4NO3 = 1,5675 mol
