Determine the number of sodium atoms in sodium phosphate with a chemical amount of 0.2 mol.

n (Na3PO4) = 0.2 mol.
Determine the number of sodium atoms in sodium phosphate. We write down the solution.
Find sodium.
1 mol contains: 6.02 * 10’23 * 3 = 1.806 * 10 ^ 24 atoms.
Next, we use the following formula.
N = n * Na.
Where N is the number of molecules.
n is the amount of substance.
Na is Avogardo’s number equal to 6.02 * 10’23.
N = 0.2 * 1.806 * 10 ^ 24 = 3.612 * 10 ^ 23 atoms.
This means that the number of sodium atoms in sodium phosphate is 3.612 * 10 ^ 23.
Answer: N = 3.612 * ^ 23.