\(n_{Fe}=\dfrac{25,2}{56}=0,45mol\)
Gọi \(\left\{{}\begin{matrix}n_{Fe}=x\\n_{Fe_2O_3}=y\end{matrix}\right.\)
\(FeO+H_2\rightarrow\left(t^o\right)Fe+H_2O\)
x x ( mol )
\(Fe_2O_3+3H_2\rightarrow\left(t^o\right)2Fe+3H_2O\)
y 2y ( mol )
Ta có:
\(\left\{{}\begin{matrix}72x+160y=34,8\\x+2y=0,45\end{matrix}\right.\) \(\Leftrightarrow\left\{{}\begin{matrix}x=0,15\\y=0,15\end{matrix}\right.\)
\(\Rightarrow m_{Fe_2O_3}=0,15.160=24g\)