What Is the Amount of Energy Released When 1 Mol

Multiple Choice

What is the amount of energy released when 1 mol of a gaseous compound with charges of +1.00 on the cation and -1.00 on the anion is formed? Assume the internuclear distance in the gas phase as 185 pm.

A) 845 kJ/mol
B) 693 kJ/mol
C) 548 kJ/mol
D) 752 kJ/mol
E) 476 kJ/mol