You have been given a series of stoichiometric equations.....
Two equivalents, 2 moles if you like, of aluminum metal react with 3 equiv of dichlorine gas to give 2 equiv aluminum trichloride.
You starting conditions propose that you have
And thus here,
I am reluctant to do the remaining problems, because I think you should work thru them yourself. You have been given balanced chemical equations that describe the equivalence, the stoichiometry. Make an attempt, and someone here will help you.