Conditions for the bottoms at 230°F and 280 psia from a depropanizer distillation unit in a refinery are given below, including the pure-component liquid densities. Assuming an ideal-liquid solution (volume of mixing = 0), compute the liquid solution density in lb/ft³. Component MW Flowrate, Ibmole/hr Liquid density, g/cm³ Propane 44 2.2 0.20 Isobutane 58 171.1 0.40 n-butane 58 226.6 0.43