According to Avogadro law, there are 6.022 x 10^23 atoms or particles present in one mole of an element or a substance.
One mole of substance = 6.022 x 10^23 particles
Number of atoms in one mole of sodium = 6.022 x 10^23 atoms
Number of atoms in 1.50 moles of sodium = 1.5 x 6.022 x 10^23 atoms
Number of atoms in 1.50 moles of sodium = 9.033 x 10^23 atoms
One mole of substance = 6.022 x 10^23 particles
Number of atoms in one mole of sodium = 6.022 x 10^23 atoms
Number of atoms in 1.50 moles of sodium = 1.5 x 6.022 x 10^23 atoms
Number of atoms in 1.50 moles of sodium = 9.033 x 10^23 atoms