\(n_{H_2SO_4}=0,2.1=0,2\left(mol\right)\)
PTHH: Fe2O3 + 3H2SO4 → Fe2(SO4)3 + 3H2O
Mol: x 3x
PTHH: CuO + H2SO4 → CuSO4 + H2O
Mol: y y
Ta có: \(\left\{{}\begin{matrix}160x+80y=16\\3x+y=0,2\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=0\\y=0,2\end{matrix}\right.\)
\(\Rightarrow\%m_{CuO}=100\%;\%m_{Fe_2O_3}=0\%\)
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