Homework Help: Chemistry

Posted by Cassie on Sunday, May 22, 2011 at 2:28pm.

iron metal & oxygen combine to form magnetic oxide of iron, Fe3O4. How many mols of iron can be converted to magnetic by 8.80 mols of pure oxygen?

Chemistry - bobpursley, Sunday, May 22, 2011 at 3:04pm
balance the equation:

3Fe + 2O2 >> Fe3O4

so it takes 3/2 molesFe for each mole O2

so moles Fe=3/2 * 8.8 moles

Writing Fe3O4 as a compound always bothers me when we know it is

FeO.Fe2O3 an almost equal mixture of Iron(II) and Iron(III) oxides.

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