Determine the number of atoms in 3.50 mol of Zinc, Zn. Avogadro's number is 6.022 x 1023 .
1 mol of Zinc contains 6.022 x 10^23 atoms.
Therefore, 3.50 mol of Zinc would contain:
3.50 mol * 6.022 x 10^23 atoms/mol = 2.1077 x 10^24 atoms
So, there are 2.1077 x 10^24 atoms in 3.50 mol of Zinc.