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Question
The formula unit mass of Ca3 (PO4)2 is ————.
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Solution
The formula unit mass of Ca3 (PO4)2 is 310.
(3 × Ca) + (2 × P) + (8 × O)
= (3 × 40) + (2 × 31) + (8 × 16)
= (120 + 62 + 128)
= 310u
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