The number of atoms in 64 grams of sulfur can be calculated using the atomic mass of sulfur and Avogadro's number.

- Atomic mass of sulfur (S) = 32.066 g/mol

- Avogadro's number = 6.022 x 10^23 atoms/mol

1. Convert the given mass of sulfur (64 g) to moles using the atomic mass:

- Moles of sulfur (S) = 64 g / 32.066 g/mol = 2 mol S

2. Use Avogadro's number to determine the number of atoms:

- Number of atoms (S) = 2 mol S x 6.022 x 10^23 atoms/mol = 1.2044 x 10^24 atoms

Therefore, there are approximately 1.2044 x 10^24 atoms in 64 grams of sulfur.