Answer:
7.87 x 10²³ atoms
Explanation:
The number of LiCl units is related to moles using Avogadro's constant (6.022 × 10²³ mol⁻¹):
(0.654 mol)(6.022 × 10²³ mol⁻¹) = 3.93 x 10²³ LiCl
One LiCl unit is composed of two atoms, one Li atom and one Cl atom, so the amount is multiplied by 2:
(3.93 x 10²³)(2) = 7.87 x 10²³ atoms
