Chapter 12 more problems

Chapter 12 more problems - General Chemistry I More...

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General Chemistry I More practice questions 09/05/2011 R. Lopez de la Vega Name_____________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) When 0.500 g of vitamin K is dissolved in 10.0 g of camphor (K f = 40.0°C/ m ), the freezing point of the solution is 4.43°C lower than that of pure camphor. Assuming vitamin K is a nonelectrolyte in camphor, calculate its molar mass. 1) A) 55.4 g/mol B) 3.54 × 10 4 g/mol C) 0.451 g/mol D) 451 g/mol 2) A solution is made by dissolving 13 g of sucrose, C 12 H 22 O 11 , in 117 g of water, producing a solution with a volume of 125 mL at 20°C. What is the expected osmotic pressure at 20°C? 2) A) 7.3 atm B) 58 atm C) 10 atm D) 14 atm 3) The solubility of gaseous solutes in liquid solvents is greater when the 3) A) external pressure over the solution is increased. B) partial pressure of the gas above the solution is increased. C) external pressure is decreased. D)
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Chapter 12 more problems - General Chemistry I More...

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