nFe=14/56=0.25(mol)
nO2=5.6/22.4=0.25(mol)
a) PTHH: 3Fe + 2O2 ---> Fe3O4
Fe3O4: oxit sắt từ
b) 3Fe + 2O2 ---> Fe3O4
BĐ: 0.25 0.25 (mol)
PƯ: 0.25 0.2 0.1 (mol)
SPƯ: 0 0.15 0.1 (mol)
mO2=0.15*32=4.8(g)
c) mFe3O4=0.1*232=23.2(g)
Mong mn tích cho mik nha