Answer:
27.8%
1 Expert Answer
% by volume means how much volume out of 100 ml is the isopropanol. So, you have 90 mls of total solution, and of that, 25 mls is isopropanol. The % by volume = 25 ml/90 ml (x100%) = 27.8% by volume.
Explanation:
C. 27.8% isopropanol
