1. Avogadro's Number:
* Avogadro's number tells us the number of particles (atoms, molecules, etc.) in one mole of a substance. It's approximately 6.022 x 10^23 particles per mole.
2. Calculation:
* Step 1: Multiply the number of moles by Avogadro's number:
0.455 moles * (6.022 x 10^23 atoms/mole) = 2.74 x 10^23 atoms
Answer: There are approximately 2.74 x 10^23 atoms in 0.455 moles of lead.
