More specifically, the 2 and 3 in front of the Al and Br in the chemical equation refer to 2 Al(s) + 3 Br(l) AlBr(s) The relative number of moles of Al and moles of Br reacting X O The relative number of atoms of Al and molecules of Br reacting O both of the above Next> (6 of 6) Recheck 1st attempt