# How many atoms are in .54 moles Pb?

There are $3.3 \times {10}^{23} \text{atoms}$ in 0.54 moles Pb.
To calculate the number of atoms in Pb, we use Avogadro's number, which is $6.02 \times {10}^{23} \text{atoms/mole}$.
0.54 "mol Pb"((6.02xx10^23 "atoms Pb")/"mol Pb")
$= 3.3 \times {10}^{23} \text{atoms Pb}$