Understanding the Concept

* Avogadro's Number: One mole of any substance contains 6.022 x 10^23 particles (atoms, molecules, etc.). This is known as Avogadro's number.

Calculation

1. Divide the number of atoms by Avogadro's number:

(2.16 x 10^24 atoms of Pb) / (6.022 x 10^23 atoms/mol) = 3.59 moles of Pb

Therefore, there are approximately 3.59 moles of lead in 2.16 x 10^24 atoms of lead.