a:
\(n_{HCl}=0.2\cdot1=0.2\left(mol\right)\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\)
b: \(Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\)
0,1 0,2 0,1 0,1
\(m_{Fe}=0.1\cdot56=5.6\left(g\right)\)
c: \(m_{FeCl_2}=0.1\cdot\left(56+35.5\cdot2\right)=12.7\left(g\right)\)
d: \(V_{H_2}=0.1\cdot22.4=2.24\left(lít\right)\)