How many atoms of P are in 3 moles of H3PO4?

2.0*10^24 atoms

Explanation:

To find the number of atoms of P in H3PO4, we need to use the Avogadro's number.

The Avogadro's number is 6.022×10^23.

From there, we can set up a "conversion factor tree" to solve for the number of atoms of P:

3 moles P ×   6.022×10^23 atoms

                      = 2.0*10^24 atoms

                                 1 mol

The moles cancel out and you are left with the number of atoms.

Make sure it's the correct number of sig figs.

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