Verified Answer :

There are 8 atoms total in the compound Na3PO4.

Explanation:

\(4Na_3PO_4\) is a compound which consists of four moles of oxygen, phosphorus and oxygen.

Number of sodium atom in \(4Na_3PO_4\) is, \(4\times 3=12\ atoms\)

Number of phosphorus atom in \(4Na_3PO_4\) is, \(4\times 1=4\ atoms\)

Number of oxygen atom in \(4Na_3PO_4\) is, \(4\times 4=16\ atoms\)

Hence, the no of atoms of each element are as follows :

Sodium, Na = 12 atoms

Phosphorus, P = 4 atoms

Oxygen, O = 16 atoms

Hence, this is the required solution.