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Calculate the percentage by mass of iron in the iron ore:

A. 54.10%
B. 35.91%
C. 46.84%
D. 67.03%

1 Answer

4 votes

Final answer:

To calculate the mass percentage of iron in Fe₂O3, divide the molar mass of iron by the molar mass of Fe₂O3 and multiply by 100%. The correct answer is B. 35.91%.

Step-by-step explanation:

To calculate the mass percentage of iron in the compound Fe₂O3, we need to first determine the molar mass of iron and the molar mass of Fe₂O3. Iron (Fe) has a molar mass of 55.8 g/mol and Fe₂O3 has a molar mass of 159.7 g/mol.

To calculate the mass percentage of iron, we divide the molar mass of iron by the molar mass of Fe₂O3 and multiply by 100%:

Mass percentage of iron = (55.8 g/mol / 159.7 g/mol) × 100% = 34.95%

Therefore, option B. 35.91% is the correct answer.

User Jeff Bowman
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