An iron ore sample contains plus other impurities. A 896-g sample of impure iron ore is heated with excess carbon, producing 182 g of pure iron by the following reaction: What is the mass percent of FeO2 in the impure iron ore sample

20.3%

Explanation:

Given mass of impure ore = 896g and mass of pure iron to be 182g after purification,

× 100

= 79.7%

in subtracting the weight of impure mass from that of the pure sample, we are left with the mass of the impurities alone.

This means the mass percent of pure iron in this iron ore sample is 20.3%.

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i'm pretty sure it is letter c.) car