PTHH: \(Fe+H_2SO_4\rightarrow FeSO_4+H_2\uparrow\)
Ta có: \(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)=n_{Fe}=n_{H_2SO_4}\)
\(\Rightarrow\left\{{}\begin{matrix}m_{Fe}=0,15\cdot56=8,4\left(g\right)\\C\%_{H_2SO_4}=\dfrac{0,15\cdot98}{150}\cdot100\%=9,8\%\end{matrix}\right.\)