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Which charge-neutral formula represents copper(II) phosphate?

A) Cu3(PO4)2

B) CuBr2

C) CuI2

D) CuF2

Answer: A

Explanation: The copper(II) ion has charge +2; the phosphate ion has charge −3. The smallest whole-number ion ratio balances their charges, giving Cu3(PO4)2.

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