A sample of Ca3(PO4) 2 contains 3.51 moles of calcium ions. How many moles of Ca3(PO4) 2 are in that sample?
A) 3.55 moles
B) 0.491 moles
C) 10.5 moles
D) 1.17 moles
E) 3.51 × 1021 moles
Correct Answer:
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