Hòa tan hoàn toàn 25,3 gam hỗn hợp X

D

- Hướng dẫn giải

\(\left\{ \begin{array}{l}
{n_{NO}} + {n_{{N_2}O}} = 0,2\\
30{n_{NO}} + 44{n_{{N_2}O}} = 7,4
\end{array} \right. \Rightarrow \left\{ \begin{array}{l}
{n_{NO}} = 0,1\,mol\\
{n_{{N_2}O}} = 0,1\,mol
\end{array} \right.\,\)

\( \Rightarrow {n_{N{O_3}^ - (trong{\rm{ muoi)}}}} = 3{n_{NO}} + 8{n_{{N_2}O}} + 9{n_{N{H_4}^ + }} = 1,1 + 9x\)

\({m_{muoi}} = {m_{kim{\rm{ loai}}}} + 18{n_{N{H_4}^ + }} + 62{n_{N{O_3}^ - }} \to 122,3 = 25,3 + 18x + 62(1,1 + 9x) \Rightarrow x = 0,05\,mol\)

\( \Rightarrow {n_{HN{O_3}}} = 10{n_{N{H_4}^ + }} + 4{n_{NO}} + 10{n_{{N_2}O}} = 1,9mol\)