http://www.bestbabyfeedingproducts.com/powder-iron/
when 0.424 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.
moles Fe = 0.424 g / 55.847 g/mol=0.00759
mass O = 0.606 - 0.424 =0.182 g
moles O = 0.182 g/ 15.999 g/mol=0.0114
the ratio between O and Fe is 0.0114 / 0.00759=1.5
Fe O 1.5
to get whole numbers multiply by 2
Fe2O3 is the empirical formula
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