In Ca3(PO4)2, how many oxygen atoms are present per formula unit?

Study for the AC-HPAT Chemistry Test. Explore flashcards and multiple choice questions, each with hints and explanations. Prepare effectively and excel in your upcoming exam!

Multiple Choice

In Ca3(PO4)2, how many oxygen atoms are present per formula unit?

Explanation:
Counting atoms in Ca3(PO4)2 relies on understanding that the group PO4 inside parentheses is a single unit and the 2 outside multiplies that whole unit. Each PO4 contains 4 oxygen atoms. Since there are two such phosphate units in the formula, there are 4 × 2 = 8 oxygen atoms in one formula unit of Ca3(PO4)2. The calcium part, Ca3, contributes calcium atoms but does not change the oxygen count.

Counting atoms in Ca3(PO4)2 relies on understanding that the group PO4 inside parentheses is a single unit and the 2 outside multiplies that whole unit. Each PO4 contains 4 oxygen atoms. Since there are two such phosphate units in the formula, there are 4 × 2 = 8 oxygen atoms in one formula unit of Ca3(PO4)2. The calcium part, Ca3, contributes calcium atoms but does not change the oxygen count.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy