Determine the percent composition of oxygen in calcium phosp...

Question Analysis
This question assesses the student's ability to calculate the percent composition of an element in a more complex compound.

Key Concept Explanation
The percent composition of an element in a compound is determined by dividing the total mass of that element in one mole of the compound by the molar mass of the compound, then multiplying by 100%.

Step-by-step Solution
1. Identify the total mass of oxygen in one mole of calcium phosphate: .
2. Use the formula for percent composition:

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