\(n_{H_2}=\dfrac{5.6}{22.4}=0.25\left(mol\right)\)
\(Fe+H_2SO_4\rightarrow FeSO_4+H_2\)
\(0.25....0.25.......................0.25\)
\(m_{Fe}=0.25\cdot56=14\left(g\right)\)
\(C_{M_{H_2SO_4}}=\dfrac{0.25}{0.1}=2.5\left(M\right)\)
a. PTHH: Fe+H2SO4-->FeSO4+H2
b. Có nH2=\(\dfrac{5.6}{22.4}=0.25\left(mol\right)\)
Theo pthh trên, nFe=nH2=0.25mol
=> mFe=0.25*56=14g
c. Theo pthh trên, nH2=nH2SO4=0.25mol
Đổi 100ml=0.1l
=> \(C_M=\dfrac{0.25}{0.1}=2.5M\)