You find a vial labelled "58.3 wt-% nitrocyclohexane in benzene", and you measure its density at 298.15 K to be 0.9769 g/cm3 .
(a) If the label is correct, what is the molar volume change upon mixing ∆mix\overline{V}for this mixture, in cm3/mol? (Data: For pure nitrocyclohexane (1), rho1 = 1.0613 g/cm3 at 298.15 K and MW1 = 129.16 g/mol. For pure benzene (2), rho2 = 0.8747 g/cm3 at 298.15 K, and MW2 = 78.11 g/mol.)
(b) Now, assume that nitrocyclohexane and benzene form an ideal mixture. If your density measurement is correct, then what should the wt-% of nitrocyclohexane be?