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Unformatted text preview: markowitz (am45362) H03: Colligative Properties mccord (51625) 1 This print-out should have 16 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points We dissolve 7.5 grams of urea (a nonelec- trolyte with MW 60 g/mol) in 500 grams of water. At what temperature would the solu- tion boil? 1. 99.87 C 2. 99.54 C 3. 100.13 C 4. 0.13 C 5. 100.46 C 002 10.0 points 10 grams of NaNO 3 is dissolved in 711 grams of water. What is the boiling point elevation in degrees Celsius? Note that K b for water is 0.512 C /m . Assume complete dissociation of the salt and ideal behavior of the solution. Answer in units of C. 003 10.0 points Which of the following aqueous solutions would exhibit the highest boiling point? 1. . 1 m urea 2. . 1 m CaCl 2 3. . 1 m NaCl 004 10.0 points The freezing point of an aqueous solution con- taining a nonelectrolyte dissolved in 315 g of water is- 1 . 8 C. How many moles of solute are present? Given that k f is 1 . 86 K kg / mol....
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