Ta có nFe = 8,4÷56=0,15(mol)
Phương trình hoá họ
3Fe + 2O2 \(\rightarrow\)Fe3O4
nFe=\(\dfrac{8,4}{56}=0,15\left(mol\right)\)
Theo PTHH ta cso:
\(\dfrac{2}{3}\)nFe=nO2=0,1(mol)
VO2=22,4.0,1=2,24(lít)
\(\dfrac{1}{3}\)nFe=nFe3O4=0,05(mol)
mFe3O4=232.0,05=11,6(g)
PT: 3Fe + 2O2 ------> Fe3O4
nFe=\(\dfrac{8,4}{56}=0,15\left(mol\right)\)
nO2= \(\dfrac{0,15.3}{2}=0,225\left(mol\right)\)=>VO2=0,225. 22,4=5,04(lit)
nFe3O4= 0,15: 3=0,05=>mFe3O4=0,05.232=11,6 g