\(n_{HCl}=0,2.3=0,6\left(mol\right)\)
PTHH: CuO + 2HCl → CuCl2 + H2
Mol: x 2x
PTHH: Fe2O3 + 6HCl → 2FeCl3 + 3H2
Mol: y 6y
Ta có hệ pt:\(\left\{{}\begin{matrix}80x+160y=20\\2x+6y=0,6\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=0,15\left(mol\right)\\y=0,05\left(mol\right)\end{matrix}\right.\)
\(\%m_{CuO}=\dfrac{0,15.64.100\%}{20}=48\%;\%m_{Fe_2O_3}=100\%-48\%=52\%\)