A sample of sodium chloride ( $$\text{NaCl}$$ ) contains $$ ...

Question Analysis
This question tests the student's ability to convert the number of formula units to moles using Avogadro's number.

Key Concept Explanation
Avogadro's number, , is used to convert the number of particles (formula units, atoms, molecules, etc.) to moles.

Step-by-step Solution
1. Identify the given number of formula units: .
2. Use Avogadro's number: