exam1spring07 - Chemistry 51 Exam 1, Spring 2007 This is a...

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Spring 2007, Chemistry 51, Organic 1, Brooklyn College, CUNY Chemistry 51 Exam 1, Spring 2007 This is a closed book exam. The exam lasts 50 minutes. All answers must appear on the answer sheet. Only the answer sheet will be collected . Put your name on the answer sheet now. When the exam is over you must hand your answer sheet in promptly or a penalty may be assessed. Each question is worth 6 points but 17 is worth 4 pts. 1. Name the following compound. Use the IUPAC system and include configurational (R,S) designations. Cl Cl 2. The specific rotation of pure R 2-bromobutane (molecular weight = 137, density = 1.45 g/mL) is 60 degrees. A mixture is made up of 13.7 grams of the R enantiomer and 27.4 of the S enantiomer. Calculate the specific rotation of the mixture. 3. Assume that methanol and water form an ideal mixture. Further assume that pure methanol has a vapor pressure 800 torr at 70 degrees C and that pure water has a vapor pressure of 300 torr at 70 degrees. What is the mole fraction of methanol in the methanol/water mixture that has a boiling point of 70 degrees under 1 atmosphere pressure, 760 torr?
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Spring 2007, Chemistry 51, Organic 1, Brooklyn College, CUNY 4. Consider Step 2 of the free radical halogenation of alkanes Step2: X . + R – H
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exam1spring07 - Chemistry 51 Exam 1, Spring 2007 This is a...

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