A 24.8 g sample of iron ore is treated as follows. The iron in the sample is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 22.2 g. What was the mass of iron in the sample of ore? Answer in units of g

Question

joannablackwelder · Answer

Can you use the molar mass to find the mass percent of iron in iron (III) oxide?

anonymous · Answer

(22.2 g Fe2O3) / (159.6882 g Fe2O3/mol) x (2 mol Fe / 1 mol Fe2O3) x 
(55.8452 g Fe/mol) = 15.5 g Fe