1. Avogadro's Number:

* Avogadro's number tells us that there are 6.022 x 10^23 formula units (or atoms or molecules) in one mole of any substance.

2. Calculation:

* Divide the number of formula units by Avogadro's number:

(2.41 x 10^24 formula units) / (6.022 x 10^23 formula units/mol) = 4.00 moles CaCl2

Therefore, 2.41 x 10^24 formula units of CaCl2 represents 4.00 moles of CaCl2.