[jsmith613]

a) In the mass spec of chlorine, I produce Cl-35 and Cl-37 (each of which has a charge of +1).
The molecule of Chlorines can be (Cl-35, Cl-35)+, (Cl-35, Cl-37)+ and (Cl-37, Cl-37)+.

Is this correct? Do I include the charges or not?

b)Does Al2O3 have a higher lattice energy than AlCl3. If yes, please say so, if not please explain.
(I say it does because we have more atomisation energies and electron affinites than AlCl3)