How many atoms are in a sample of 2.39 moles of neon (ne) atoms?
6.02 × 1023 atoms ne
1.44 × 1024 atoms ne
3.97 × 10-24 atoms ne
2.52 × 1023 atoms ne

Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles.

 2.39 moles Ne ( 6.022 x 10^23 atoms / mole ) = 1.44 × 10^24 atoms Ne