(Q3-12) A mixture contains 35 mol% isobutane, 25 mol% isopentane, and 40 mol% n-hexane is at 30 psia. This mixture is flashed at 582.74R where 40 mol% of the feed is evaporated and at these conditions Kic4 = 3.1718, Kics = 1.051, and Knico - 0.3169. = The fraction of iso-pentane in the feed recovered in the liquid phase is 0.588 0.548 0.508 None of the given answers