Answer:- HBr is limiting reactant.
Solution:- The given balanced equation is:

From this equation, There is 2:6 mol or 1:3 mol ratio between Al and HBr. Since we have 8 moles of each, HBr is the limiting reactant as we need 3 moles of HBr for each mol of Al.
The calculations could be shown as:

= 24 mol HBr
From calculations, 24 moles of HBr are required to react completely with 8 moles of Al but only 8 moles of it are available. It clearly indicates, HBr is limiting reactant.
Pretty sure it’s 2, increase in strength of hurricanes
1.0×10^−15/4.2×10^−7=<span>2.3809524e-23 Hoped I helped!</span>
The answer would be the last one- it separates dissolved substances.
Have a great rest of your day!