Em tham khảo nha:
\(\begin{array}{l}
a)\\
CTHH:{N_x}{H_y}\\
{M_A} = 8,5 \times 2 = 17dvC\\
{m_N} = 82,35\% \times 17 = 14g\\
{m_H} = 17 - 14 = 3g\\
{n_N} = \dfrac{{14}}{{14}} = 1\,mol\\
{n_H} = \dfrac{3}{1} = 3\,mol\\
x:y = {n_N}:{n_H} = 1:3 \Rightarrow CTHH:N{H_3}\\
b)\\
{n_{N{H_3}}} = \dfrac{{1,12}}{{22,4}} = 0,05\,mol\\
{n_N} = {n_{N{H_3}}} = 0,05\,mol\\
{A_N} = 0,05 \times 6 \times {10^{23}} = 3 \times {10^{22}}\\
{n_H} = 3{n_{N{H_3}}} = 0,15\,mol\\
{A_H} = 0,15 \times 6 \times {10^{23}} = 9 \times {10^{22}}
\end{array}\)