\(n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\)
PTHH: Fe + H2SO4 --> FeSO4 + H2
0,2--->0,2
=> \(m_{H_2SO_4}=0,2.98=19,6\left(g\right)\)
\(n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\\ Fe+H_2SO_4\rightarrow FeSO_4+H_2\\ n_{H_2SO_4}=n_{Fe}=0,2\left(mol\right)\\ \Rightarrow m_{H_2SO_4}=0,2.98=19,6\left(g\right)\)