5.01 moles of magnesium phosphate contain how many atoms of phosphorus?

Explanation:

Deal with 1 mole first.

The chemical formula of Magnesium Phosphate is

Mg3(PO4)2

The 2 tells you that there are 2 mols of Phosphorus in the chemical.

1 mol of anything is 6.02 * 10^23 (in this case) atoms.

2 mols of anything is 12.04 * 10^23 atoms

2 moles of anything is 1.204 * 10^24 (the 2 answers are the same. This one is more correct in scientific notation.)

Now we come to the 5.01. Where does that go?

5.01 * Mg3(PO4)2

So multiply 1.204 * 10^24 by 5.01 When you do, you get

7.26 * 10^24 atoms

i have know clue i guess aluminum

i think lol

c. is the answer

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