Answer:
Formula Units = 1.42 × 10²³
Solution:
Step 1: Calculate Moles using following formula,
Moles = Mass ÷ M.mass
As,
M.mass of MgCl₂ = 95.2 g.mol⁻¹
Putting values,
Moles = 22.6 g ÷ 95.2 g.mol⁻¹
Moles = 0.237 mol
Step 2: Calculate number of Formula Units using following formula,
Formula Units = Moles × 6.022 × 10²³
Putting values,
Formula Units = 0.237 × 6.022 × 10²³
Formula Units = 1.42 × 10²³