Explain a sample weighing 3073 g is a mixture of fe2o3, Chemistry

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Explain a sample weighing 3073 g is a mixture of fe2o3

Explain a sample weighing 3.073 g is a mixture of Fe2O3 molar mass = 159.69 and Al2O3 molar mass = 101.96. While heat and a stream of H2 gas is applied the to the sample the Fe2O3 reacts to form metallic Fe and H2O(g). The Al2O3 doesn't react. If the sample residue weighs 2.777 g, explain what is the mass fraction of Fe2O3 in the original sample?

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Chemistry: Explain a sample weighing 3073 g is a mixture of fe2o3

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