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Worksheet titled "Percent Composition Practice Worksheet" featuring seven chemistry problems related to calculating mass and percent composition of elements in different chemical compounds.

Percent Composition Practice Worksheet with seven chemistry problems involving calculations of mass, percent composition, and elemental analysis for various compounds.

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1. 39.2 g of oxygen can be produced from the decomposition of 100 g of KClO₃.
2. 17.5 g of iron can be recovered from 25.0 g of Fe₂O₃.
3. 110. g of silver can be produced from 125 g of Ag₂S.
4. 40.0% of glucose, C₆H₁₂O₆, is carbon.
5. The percent compositions in Zn₃(PO₄)₂ are: Zinc = 50.0%, Phosphorus = 16.0%, Oxygen = 34.0%.
6. 20.1% of FeSO₄·6H₂O is Fe.
7. The percent composition of each element in N₂S₂ is: Nitrogen = 30.4%, Sulfur = 69.6%.

Parent Tip: Review the logic above to help your child master the concept of percentage composition worksheet answers.

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