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