`3Fe+2O_2 \overset{t^o}\to Fe_3O_4`
`n_{O_2}=0,2(mol)`
`=>n_{Fe_3O_4}=1/2n_{O_2}=0,1(mol)`
`=>m_{Fe_3O_4}=23,2`
`n_{Fe}=3/2n_{O_2}=0,3(mol)`
`=>n_{Fe}=16,8`
nO2 = 4.48/22.4 = 0.2 (mol)
3Fe + 2O2 -to-> Fe3O4
0.3___0.2_______0.1
mFe = 0.3*56 = 16.8 (g)
C1 :
mFe3O4 = 0.1*232 = 23.2 (g)
C2 :
BTKL :
mFe3O4 = mFe + mO2 = 16.8 + 0.2*32 = 23.2 (g)