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TEAS Nursing School Review Questions

Category - Science

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Which of the following is the correct molecular formula for magnesium phosphate tribasic?

(Mg(H₂PO₄)₂)
Mg₃(PO₄)₂
Mg(PO₄)₂
(MgHPO₄)

Explanation

Answer: B - Mg₃(PO₄)₂

Phosphate is a polyatomic anion with the molecular formula PO₄^3-, and magnesium typically takes an oxidation state of +2. The simplest way to balance these charges gives the correct molecular formula, Mg₃(PO₄)₂.

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