Understanding the Concepts
* Mole (mol): A unit of measurement that represents a specific number of particles (atoms, molecules, etc.). One mole contains 6.022 x 10^23 particles (Avogadro's number).
* Avogadro's Number: The number of particles in one mole of any substance.
Calculation
1. Start with the number of moles: You have 3.91 moles of sodium.
2. Multiply by Avogadro's Number:
3.91 moles * (6.022 x 10^23 atoms/mole) = 2.35 x 10^24 atoms
Answer: There are approximately 2.35 x 10^24 atoms in 3.91 moles of sodium.
