1. Convert Formula Units to Moles

* Avogadro's Number: There are 6.022 x 10²³ formula units (or molecules) in one mole of a substance.

* Calculation:

(4.59 x 10²⁴ formula units) / (6.022 x 10²³ formula units/mole) = 7.62 moles NaCl

2. Calculate the Mass

* Molar Mass of NaCl: The molar mass of NaCl is 58.44 g/mol (22.99 g/mol for Na + 35.45 g/mol for Cl).

* Calculation:

(7.62 moles NaCl) * (58.44 g/mol) = 446 g NaCl

Therefore, 4.59 x 10²⁴ formula units of sodium chloride corresponds to a mass of 446 grams.