
Concept explainers
Magnetite and hematite are iron ore minerals. On the basis of their chemical formulas, which mineral has a higher percentage of iron? (Magnetite is Fe2O3, hematite is Fe2O3.)

The mineral that contains higher percentage of iron from Magnetite and hematite.
Answer to Problem 8PEB
Solution:
Magnetite
Explanation of Solution
Given data:
Magnetite is
Hematite is
Formula used:
Write the mass percent of an element in a compound, which can be found from:
Explanation:
For Magnetite:
The formula for
The formula weight of Magnetite:
Recall the mass percent of an element in a compound, which can be found from:
Substitute
For Hematite:
The formula for:
The formula weight of Hematite:
Recall the mass percent of an element in a compound, which can be found from:
Substitute
Conclusion:
Magnetite has the higher percent of iron.
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