practice exam 1-1 Ch. 12

practice exam 1-1 Ch. 12 - 1. *The mass percent of acetone...

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1. **The mass percent of acetone in a solution prepared by mixing 58.1 g acetone (C 3 H 6 O) and 72.1 g of H 2 O is: 1] 55.4% 2] 80.6% 3] 44.6% 4] 13.9% 5] none of these 2. Which substance listed below would be most likely to dissolve in H 2 O? 1] C 2 H 6 2] I 2 3] NH 3 4] CH 2 Cl 2 5] none would dissolve 3. A gas dissolves in water, forming a saturated solution and giving off heat. When the solution is heated: 1. the solubility of the gas decreases. 2. the solubility of the gas increases. 3. the solubility of the gas does not change. 4. the dissolved gas causes the water to boil at a lower temperature. 5. no general prediction can be made about the solubility change. 4. **A solution of a nonelectrolyte dissolved in carbon tetrachloride has a boiling point that is 4.50°C higher than the solvent. What is the molality of the solute given k b is 5.03°C/m? 1] 8.95 m 2] 0.895 m 3] 11.2 m 4] 0.105 m 5] none of these 5. Which aqueous solution has the lowest freezing point? 1]
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This note was uploaded on 02/24/2011 for the course CHEM 112 taught by Professor Chen during the Fall '09 term at South Carolina.

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practice exam 1-1 Ch. 12 - 1. *The mass percent of acetone...

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