Zinc has a molar mass of about 65.38 g/mol. So we calculate the number of moles first:
moles Zinc = 8.93 g / (65.38 g/mol) = 0.1366 mol
We can calculate for the number of atoms using Avogadros number.
atoms Zinc = 0.1366 mol * 6.022 x 10^23 atoms / mol
atoms Zinc = 8.23 x 10^22 atoms