mass atomic of Ne=20.18 u
Therefore:
molar mass=20.18 g/1 mol
1 mole=6.02210²³ particles (atoms or molecules)
Then: 6.02210²³ atoms are contained in 20.18g
Now, We can solve this problem by the three rule.
6.02210²³ atoms-------------------20.18 g
x------------------------------------------32 g
x=(6.02210²³ atoms 32 g)/20.18 g=9.5510²³ atoms.
Answer: 9.55*10²³ Ne atoms are contained in 32 g of the element.