1. What would be the freezing pint of a solution containing 1.95 grams of biphenyl (C12H10) dissolved in 1.00 x 102 grams of cyclohexane if the normal freezing point of cyclohexane is 6.6C? Provide your answer using the correct units and correct significant figures (5 pts). 2. What is the molar mass of urea if the freezing point of a solution containing 15.0 grams of urea in 1.00 x 102 grams of naphthalene is 63.3C (5 pts). TABLE 19.1 Molal Freezing-Point and Boiling-Point Constants Freezing Boiling Solvent point (C) KtpCm) point ("KbplC) CH,COOH (acetic acid) 16.6 3.90 118.1 293 C.H. (benzene) 55 5.12 80.1 253 CHCl, (chloroform) -63.5 4.68 61.2 3.63 GH OH (ethyl alcohol) -114.6 1.99 78.4 1.22 HO (water) 0.0 1.86 100.0 0.51 CH, (naphthalene) 80.6 69 218 CH(cyclohexane) 5.6 80.7 2.79 20.4