a)
$Fe + 2HCl \to FeCl_2 + H_2$
$n_{FeCl_2} = n_{Fe} = \dfrac{11,2}{56} = 0,2(mol)$
$m = 0,2.127 = 25,4(gam)$
b)
$n_{H_2} = n_{Fe} = 0,2(mol)$
$V_{H_2} = 0,2.22,4 = 4,48(lít)$
Ta có: \(n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\)
a. PTHH: Fe + 2HCl ---> FeCl2 + H2
Theo PT: \(n_{FeCl_2}=n_{Fe}=0,2\left(mol\right)\)
=> \(m_{FeCl_2}=0,2.127=25,4\left(g\right)\)
b. Theo PT: \(n_{H_2}=n_{Fe}=0,2\left(mol\right)\)
=> \(V_{H_2}=0,2.22,4=4,48\left(lít\right)\)