1. Avogadro's Number

* Avogadro's number tells us that there are 6.022 x 10²³ atoms in one mole of any substance.

2. Calculation

* Divide the number of chlorine atoms by Avogadro's number:

(4.37 x 10¹⁸ atoms Cl) / (6.022 x 10²³ atoms/mol) = 7.26 x 10⁻⁶ moles Cl

Answer: You can make approximately 7.26 x 10⁻⁶ moles of chlorine from 4.37 x 10¹⁸ atoms of chlorine.