\(n_{HCl}=0,2.3=0,6\left(mol\right) \\ Fe+2HCl\xrightarrow[]{}FeCl_2+H_2\\ n_{Fe}=\dfrac{0,6}{2}=0,3\left(mol\right)\\ m_{Fe}=0,3.56=16,8\left(g\right)\\ n_{H_2}=n_{Fe}=n_{FeCl_2}=0,3mol\\ V_{H_2}=0,3.22,4=6,72\left(l\right)\\ m_{FeCl_2}=0,3.127=38,1\left(g\right)\)