a, \(n_{Fe}=\frac{0.56}{56}=0.01\left(mol\right)\)
\(Fe+H_2SO_4\rightarrow FeSO_4+H_2\)
0.01 0.01 0.01 0.01
\(V_{H_2}=0.01\times22.4=0.224\left(l\right)\)
b, \(m_{H_2SO_4}=0.01\times98=0.98\left(g\right)\)
\(m_{ddH_2SO_4}=\frac{100\times0.98}{19.6}=5\left(g\right)\)
\(m_{FeSO_4}=0.01\times152=1.52\left(g\right)\)
\(C\%_{FeSO_4}=\frac{1.52\times100}{5}=30.4\%\)