posted by kit .
when a 424-g of iron powder is burned in an oxygen atmosphere, 0.606-g of a reddish brown oxide is obtained. Determine the empirical formula of the oxide.
424 g of Fe is 424/55.85 = 7.59 moles
Is that 0.606 g or 606 g of brown oxide?
Recheck your numbers. If it is 606 g, then 182 g or 11.38 moles are oxygen atoms. That is a 1.50:1 O/Fe ratio
The empirical formula is Fe2O3