One mole of a substance contains 6.02 × 10∧23 particles. Thus we first convert 89.2 g to moles. 1 mole of sodium contains 23 g Hence 89.2 g = 89.2 / 23 g = 3.878 moles Therefore, 3.878 × 6.02×10∧23 particles= 23.346 × 10∧23 particles Hence 89.2 g of sodium contains 2.335 ×10∧24 particles
