Homework Help: chemistry

Posted by Nick on Thursday, August 30, 2012 at 10:18pm.

An ore contains Fe3O4 and no other iron. The
iron in a 38.8-gram sample of the ore is all
converted by a series of chemical reactions to
Fe2O3. The mass of Fe2O3 is measured to be
25 g. What was the mass of Fe3O4 in the
sample of ore?

chemistry - DrBob222, Thursday, August 30, 2012 at 11:56pm
See your previous post.

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