Phần1
Fe2O3+3CO--->2Fe+3CO2
Ta có
n Fe=11,2/56=0,2(mol)
Theo pthh
n FE2o3=1/2n Fe=0,1(mol)
m Fe2O3=0,1.160=16(g)
Phần 2
Fe+2HCl--->FeCl2+H2
n H2=2,24/22,4=0,1(mol)
Theo pthh
n FE=n H2=0,1(mol)
m Fe=0,1.56=5,6(g)
\(\sum m_{hh}=16+5,6=21,6\left(g\right)\)
%m Fe2O3=\(\frac{16}{21,6.}.100\%=74\%\)
%m Fe=100-74=26%