How many phosphate groups are present in Ca3(PO4)2?

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Multiple Choice

How many phosphate groups are present in Ca3(PO4)2?

Explanation:
Two phosphate groups. In a formula, the group inside the parentheses is repeated as many times as the subscript outside. Ca3(PO4)2 shows the PO4 unit repeated twice, so there are two phosphate groups in the compound. Each PO4 unit contains one phosphorus atom, so there are also two phosphorus atoms total.

Two phosphate groups. In a formula, the group inside the parentheses is repeated as many times as the subscript outside. Ca3(PO4)2 shows the PO4 unit repeated twice, so there are two phosphate groups in the compound. Each PO4 unit contains one phosphorus atom, so there are also two phosphorus atoms total.

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