Here's how to calculate the number of atoms in 0.44 moles of lead (Pb):

1. Avogadro's Number

* Avogadro's number tells us the number of atoms or molecules in one mole of a substance. It's approximately 6.022 x 10^23.

2. Calculation

* Multiply the number of moles by Avogadro's number:

0.44 moles Pb * (6.022 x 10^23 atoms/mole) = 2.65 x 10^23 atoms of Pb

Therefore, there are approximately 2.65 x 10^23 atoms in 0.44 moles of lead.