Ta có phương trình:
\(3Fe+2O_2\rightarrow Fe_3O_4\)
\(nFe=\dfrac{13,2}{56}=\dfrac{33}{140}\left(mol\right)\)
\(\Rightarrow nFe_3O_4=\dfrac{33}{140}:3=\dfrac{11}{140}\left(mol\right)\)
\(\Rightarrow mFe_3O_4=\dfrac{11}{140}.232=\dfrac{638}{35}\left(g\right)\)
nFe=13,2:56=33/140 mol
3Fe + 2O2 ->Fe3O4
33/140-> 11/140 (mol)
mFe3O4=11/140.232=668/35g nha