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6. Which of the following statements is/are true? I. Because ionic forces are so much stronger than hydrogen bonds, no ionic compound will be soluble in ethanol (CH3CH2OH) II. Making of any solution in which a solid is dissolved in a liquid will always have a positive entropy. III. the heats of hydration of ions increase (become more exothermic) as ionic charge increases A. I and II only B. I and III only C. II and III only D. all three are true E. none are true Ans. C 7. Which of the following statements is/are true? I. Supersaturated solutions are very stable II. The solubility of gases in liquids increases as the temperature is raised III. The solubility of gases in liquids is independent of the external pressure 8. A solution is made by dissolving 27.8 g of nicotine (Molar Mass = 160 g/mol) in 145 g of cyclohexane (C6H12) to form 142 mL of solution. Calculate the mole fraction of the solute and the molarity, respectively, of this solution. 9. An aqueous solution of hydrogen peroxide (H2O2) that is 30.0% by mass has a density of 1.11 g/mL. Calculate the molality of this solution.