a) Fe + H2SO4 → FeSO4 + H2
b) Ta có : nH2 = \(\dfrac{16,8}{22,4}\) = 0,75 (mol)
⇒ nFe= 0,75.56 = 42(gam)
Ta có: \(n_{H_2}=\dfrac{16,8}{22,4}=0,75\left(mol\right)\)
a. \(PTHH:Fe+H_2SO_4--->FeSO_4+H_2\uparrow\)
b. Theo PT: \(n_{Fe}=n_{H_2}=0,75\left(mol\right)\)
\(\Rightarrow m_{Fe}=56.0,75=42\left(g\right)\)