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11 - Name Date 1 A correct statement of Henry's law is A...

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Name: __________________________ Date: _____________ 1. A correct statement of Henry's law is: A) the concentration of a gas in solution is inversely proportional to temperature. B) the concentration of a gas in solution is directly proportional to the mole fraction of solvent. C) the concentration of a gas in solution is independent of pressure. D) the concentration of a gas in a solution is inversely proportional to pressure. E) none of these 2. The term "proof" is defined as twice the percent by volume of pure ethanol in density of ethanol = 0.80 g/cm 3 density of water = 1.0 g/ cm 3 mol. wt. of ethanol = 46 3. A solution containing 442.6 g of Mg(NO 3 ) 2 per liter has a density of 1.114 g/mL. The molarity of the solution is: 4. At a given temperature, you have a mixture of benzene (vapor pressure of pure benzene = 745 torr) and toluene (vapor pressure of pure toluene = 290 torr). The mole fraction of benzene in the vapor above the solution is 0.590. Assuming ideal behavior, calculate the mole fraction of toluene in the solution. Page 1

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5. When 0.795 g of NH 4 NO 3 was added to 150.0 g of water in a Styrofoam cup, the temperature dropped by 0.413 o C. The heat capacity of H 2 O is 4.18 J/g o C. Assume the specific heat of the solution equals that of pure H 2 O and that the calorimeter neither absorbs nor leaks heat. The molar heat of solution of solid NH 4 NO 3 is: A) + 261 J/mol B) + 26.1 kJ/mol C) + 2.61 kJ/mol D) –2.61 kJ/mol E) –261 J/mol 6. A 0.2 molar solution of a solute, X, in benzene, displays an osmotic pressure given by the formula π = (0.1) RT . Which of the following is most likely to be the case?
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11 - Name Date 1 A correct statement of Henry's law is A...

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