Phần 2:
\(n_{H_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)
PTHH: Fe + 2HCl --> FeCl2 + H2
_____0,1<-----------------------0,1
=> nFe = 0,1 (mol)
Phần 1:
PTHH: Fe2O3 + 3H2 --to--> 2Fe + 3H2O
_______a-------------------->2a
=> 2a + 0,1 = \(\dfrac{11,2}{56}=0,2\)
=> a = 0,05
=> \(\left\{{}\begin{matrix}\%Fe=\dfrac{56.0,1}{56.0,1+160.0,05}.100\%=41,176\%\\\%Fe_2O_3=\dfrac{160.0,05}{56.0,1+160.0,05}.100\%=58,824\%\end{matrix}\right.\)