1. Avogadro's Number:
* Avogadro's number tells us the number of particles (atoms, molecules, etc.) in one mole of a substance. It's a constant: 6.022 x 10^23 particles/mole.
2. Calculation:
* Step 1: Multiply the number of moles by Avogadro's number:
4.0 moles * 6.022 x 10^23 atoms/mole = 2.4088 x 10^24 atoms
Answer: There are approximately 2.4088 x 10^24 atoms present in 4.0 moles of sodium.
