a) Ta có PT: Fe + HCl -----> FeCl2 + H2
n\(H_2\)=\(\frac{4,48}{22,4}\)=0,2(mol)
Theo PT ta có: nFe = n\(H_2\)= 0,2(mol)
mFe = 56. 0,2 = 11,2(g)
=> %mFe= \(\frac{11,2}{17,6}\).100%=63,64%
%mCu = 100% - 63,64%= 36,36%
b) Theo PT ta có : nHCl = 2nFe = 2.0,2 = 0,4(mol)
=>VHCl = \(\frac{0,4}{2}\)= 0,2(l)