What is the number of sulphur atoms in 64 g of S8?

S₈ is a molecule containing 8 sulphur atoms. Molar mass of S₈ = 32 × 8 = 256 g/mol Given mass = 64 g Number of moles = 64 g ÷ 256 g/mol = 0.25 mol Each mole of S₈ contains 8 moles of sulphur atoms: Total sulphur atoms = 0.25 mol × 8 × 6.022 × 10²³ = 1.204 × 10²⁴ atoms But since the question asks for number of atoms in 64 g of S₈, and not individual sulphur atoms in total: 0.25 mol of S₈ molecules × Avogadro's number = 0.25 × 6.022 × 10²³ = 1.5055 × 10²³ molecules of S₈ Each S₈ has 8 atoms: 1.5055 × 10²³ × 8 ≈ 1.204 × 10²⁴ sulphur atoms So the closest correct option is: 1.204 × 10²⁴ sulphur atoms.