\(Fe_2O_3\left(0,075\right)+3H_2\left(0,225\right)\rightarrow2Fe\left(0,15\right)+3H_2O\)
\(CuO\left(0,1\right)+H_2\left(0,1\right)\rightarrow Cu\left(0,1\right)+H_2O\)
\(m_{Fe_2O_3}=20.60\%=12\left(g\right)\)
\(\Rightarrow n_{Fe_2O_3}=\frac{12}{160}=0,075\left(mol\right)\)
\(\Rightarrow m_{Fe}=0,15.56=8,4\left(g\right)\)
\(m_{CuO}=20.40\%=8\left(g\right)\)
\(\Rightarrow n_{CuO}=\frac{8}{80}=0,1\left(mol\right)\)
\(\Rightarrow m_{Cu}=0,1.64=6,4\left(g\right)\)
\(\Rightarrow n_{H_2}=0,225+0,1=0,325\left(mol\right)\)
\(\Rightarrow V_{H_2}=0,325.22,4=7,28\left(l\right)\)