\(n_{N_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
PT: \(N_2+3H_2\underrightarrow{t^o}2NH_3\)
Theo PT: \(n_{NH_3\left(LT\right)}=2n_{N_2}=0,4\left(mol\right)\)
\(\Rightarrow m_{NH_3\left(LT\right)}=0,4.17=6,8\left(g\right)\)
\(\Rightarrow H=\dfrac{1,7}{6,8}.100\%=25\%\)