How many moles are in 2.3 x 10^24 atoms of NaCl?

Question

I don't understand this and I can't seem to find the answer.

Answer 1

One mole of any element or compound has 6.022 x 102³ atoms or molecules. This can be written as a conversion factor as 1mole/ 6.022 x 10²³ molecules or atoms. You want to find how many moles are in 2.3 x 10²⁴ atoms of NaCl.

NaCl is composed of two atoms, so you can interpret this to mean that 1/2 of 2.3 x 10²⁴ atoms are Na atoms, and 1/2 x 2.3 x 10²⁴ are Cl atoms. If this is the case, then there are only 1/2 x 2.3 x 10²³ total NaCl formula units.

Now we can use the conversion factor from the first part.

1 mole /6.022 x 10²³ atoms x 1/2 x 2.3 x 10²⁴ atoms = 1.9 moles NaCl

I hope this is the right interpretation. Please let me know the correct answer one way or the other.