To determine the number of atoms in 1.50 mol of Na, we can use Avogadro's number, which represents the number of atoms, molecules, or ions present in one mole of a substance. Avogadro's number is approximately 6.022 x 10^23.

So, the number of atoms in 1.50 mol Na can be calculated as follows:

Number of atoms = (1.50 mol Na) * (6.022 x 10^23 atoms/mol)

Number of atoms = 9.033 x 10^23 atoms

Therefore, there are approximately 9.033 x 10^23 atoms in 1.50 mol Na.