PT: \(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)
\(CuO+H_2\underrightarrow{t^o}Cu+H_2O\)
Giả sử: \(\left\{{}\begin{matrix}n_{Fe_2O_3}=x\left(mol\right)\\n_{CuO}=y\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow160x+80y=40\left(1\right)\)
Ta có: \(n_{H_2}=\dfrac{14,56}{22,4}=0,65\left(mol\right)\)
Theo PT: \(n_{H_2}=3n_{Fe_2O_3}+n_{CuO}=3x+y\left(mol\right)\)
⇒ 3x + y = 0,65 (2)
Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}x=0,15\left(mol\right)\\y=0,2\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}\%m_{Fe_2O_3}=\dfrac{0,15.160}{40}.100\%=60\%\\\%m_{CuO}=40\%\end{matrix}\right.\)
Bạn tham khảo nhé!