A 200 G a Sample Is Composed of a Mixture of of Fe₂O₃

Multiple Choice

A 20.0 g a sample is composed of a mixture of Fe₂O₃ and Fe₃O₄. The mixture is found to contain 14.45 g of iron. What percent of the sample is Fe₂O₃?

A) 2%
B) 22%
C) 50%
D) 72%
E) 98%