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Question: An aqueous solution of potassium phosphate is mixed with an aqueous solution of calcium nitrate. A precipitate is formed and sinks to the bottom of the beaker. What is the chemical formula of the solid that forms?

1. Ca2(PO4)3

2. Ca3(PO4)2

3. K(NO3)2

4. KNO3

5. KNO2

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