How much energy is evolved when 2,65 mg of Cℓ(g) atoms accept electrons to form

Cℓ–1 (g) ions?

2 answers

349 kJ/mol for Cl ==> Cl^-
Convert that to 2.65 mg.
349 kJ/35.45 g converted to 2.65 mg will be 349 kJ x (0.00265/35.45) = ? kJ.
if i may ask, where did you get 349kJ/mol from?