To answer this question you need to use stoichiometry
We have the number of moles for bromine, we can use that, and the equation is balanced so we can move on
If you look at the reaction, how many moles of HBr are there per 1 Br2? There’s 2/1 or just 2 HBr per 1 Br2. Multiply that with 0.732
2 x 0.732 = 1.464 mol
Hope this helps