Answer
$4.949\times10^{23}\ atoms\ Sn $
Work Step by Step
1. Use the molar mass of tin and Avogadro's number as conversion factors in order to determine the number of atoms of tin.
2. $97.522 g\ Sn \times\frac{1\ mol\ Sn}{118.71\ g\ Sn}\times\frac{6.022\times10^{23}}{1\ mol\ Sn}= 4.949\times10^{23}\ atoms\ Sn $
