Determine the percent composition of phosphorus in a compoun...

Question Analysis
This question tests the student's ability to calculate the percent composition of an element in a compound, specifically focusing on a more complex formula.

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

Step-by-step Solution
1. Determine the molar mass of :
Molar mass of Ca = 40.1 g/mol
Molar mass of P = 31.0 g/mol
Molar mass of O = 16.0 g/mol
Molar mass of

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