Understanding the Concept

* Formula Units: A formula unit represents the smallest unit of an ionic compound (like salt, NaCl).

* Moles: A mole is a unit of measurement that represents a specific number of particles (6.022 x 10^23).

Calculation

1. Avogadro's Number: One mole of any substance contains 6.022 x 10^23 formula units (or molecules for covalent compounds).

2. Conversion: To find the number of formula units in 10 moles of salt (NaCl), we multiply:

10 moles NaCl * (6.022 x 10^23 formula units NaCl / 1 mole NaCl) = 6.022 x 10^24 formula units of NaCl

Answer: There are 6.022 x 10^24 formula units of salt (NaCl) in 10 moles.