2Mg+O2--->2MgO
3Fe+2O2--->Fe3O4
2Mg + O2➝2MgO
3Fe+2O2➝Fe3O4
2Mg+O\(_2\)→2MgO
3Fe+2O\(_2\)→Fe\(_3\)O\(_4\)
2Mg+O2--->2MgO
3Fe+2O2--->Fe3O4
2Mg+O2--->2MgO
3Fe+2O2--->Fe3O4
2Mg + O2➝2MgO
3Fe+2O2➝Fe3O4
2Mg+O\(_2\)→2MgO
3Fe+2O\(_2\)→Fe\(_3\)O\(_4\)
2Mg+O2--->2MgO
3Fe+2O2--->Fe3O4