333.415 grams
Your general equation is Al + 3Cl -> AlCl3
A mole of Aluminum weighs 26.98 grams.
26.98 x 2.5 = 67.45 (so that is the weight of the aluminum in your AlCl3 compound.
Now lets add the weight of the Cl.
the molar mass of chlorine is 35.45 grams/mole.
