For the following questions/problems circle the letter of the choice that best completes each statement. When you finish the exam mark your Scantron form carefully, make sure your name is on both the test form and the Scantron, and turn both in at the instructor's table. You should try to answer all parts of the test. This test is Closed-Book/Closed Notes. Question 1-10 are compulsory questions. Question 11-13 are bonus questions. Question 1- 12 carries 10 marks. Question 13 carries 20 marks. 1) When a quantity of an unknown, non-dissociating substance weighing 2.35 g is dissolved in 12.0 g of cyclohexane, the freezing point of the cyclohexane mixture is depressed by 8.89 ĆĀ°C from that of pure cyclohexane. Given that the k value for cyclohexane = 20.0 oChn, the molar mass, MM, of the unknown substance is: a) 441 g/mole b) b) 125 g/mole c) c) 236 g/mole d) d) 645 g/mole e) e) 98.3 g/mole Seventy-five (75.0 mL) of a solution of 6.0 M NaCl is mixed with water to a final volume of 400.0 mL of solution. The molar concentration of the diluted solution is: 2) a) 1.12M b) 32.0 M c) 3.30 M d) 2.26 M) 0.602 M 3) Among the given Ke values which reaction will have more ratio of product to the reactant a)Kc=0.1 b) Kc = 0.01 c) Kc = 0.05 d) Kc =0.001 e) Kc =0.003 ) Group I cations with the addition of HCI (aq) always get precipitate in what color? a) Black b) White c) Yellow d) Gray e) Red