An ore contains Fe3O4 and no other iron. Theiron in a 40.2-gram sample of the ore is allconverted by a series of chemical reactions toFe2O3. The mass of Fe2O3 is measured to be28.3 g. What was the mass of Fe3O4 in thesample of ore?Answer in units of gA 19.2 g sample of iron ore is treated asfollows. The iron in the sample is all convertedby a series of chemical reactions to Fe2O3.The mass of Fe2O3 is measured to be 20.4 g.What was the mass of iron in the sample ofore?Answer in units of g
