\(n_{Mg}=0,08\left(mol\right)\)
\(n_{N_2O}=0,01\left(mol\right)\)
Bảo toàn e:
\(2n_{Mg}=8n_{NH_4^+}+8n_{N_2O}\)
\(\Rightarrow n_{NH_4^+}=0,01\left(mol\right)\)
\(\Rightarrow\left\{{}\begin{matrix}n_{Mg\left(NO_3\right)_2}=0,08\left(mol\right)\\n_{NH_4NO_3}=0,01\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow m_{\text{muối}}=0,08.148+0,01.80=12,64\left(g\right)\)