Fe2O3 + 3CO -> 2Fe + 3CO2 (1)
Fe3O4 + 4CO -> 3Fe + 4CO2 (2)
nCO=\(\dfrac{11,2}{22,4}=0,5\left(mol\right)\)
Đặt nFe2O3=a \(\Leftrightarrow\)mFe2O3=160a
nFe3O4=b\(\Leftrightarrow\)mFe3O4=232b
Ta có hệ pt:
\(\left\{{}\begin{matrix}160a+232b=27,6\\3a+4b=0,5\end{matrix}\right.\)
=>a=0,1;b=0,05
mFe2O3=160.0,1=16(g)
%mFe2O3=\(\dfrac{16}{27,6}.100\%=57,971\%\)
%mFe3O4=100-57,971=42,029%
c;
Theo PTHH 1 và 2 ta có:
nFe(1)=2nFe2O3=0,2(mol)
nFe(2)=3nFe3O4=0,15(mol)
mFe=0,35.56=19,6(g)