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20) The specific rotation of (S)-naproxen, the active ingredient in Aleve, is +66.0° (at 20 °C). If the observed specific rotation of a mixture of (S)-naproxen and its enantiomer is +59.4°, what percent of the naproxen is present as the Senantiomer? a) 97.0% b) 85.0 % c) 95.0% d) 90.0%

20) The specific rotation of (S)-naproxen, the active ingredient in Aleve, is +66.0° (at 20 °C). If the observed specific rotation of a mixture of (S)-naproxen and its enantiomer is +59.4°, what percent of the naproxen is present as the Senantiomer? a) 97.0% b) 85.0 % c) 95.0% d) 90.0%

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Solve question 20 and if you can explain another question as well.

### Educational Content Transcription #### Question 16: **Task:** Select the structure formed by the reaction step shown below. **Diagram Description:** A reaction mechanism featuring a carbon chain where an oxygen atom attacks a proton. The curved arrow indicates the movement of electrons from the oxygen to the hydrogen. **Options:** a) ![Option A](with a positive charge on oxygen after reaction) b) ![Option B](oxygen with an electron lone pair and no charge) c) ![Option C](oxygen bonded to hydrogen with lone pairs) d) ![Option D](oxygen with a positive charge bonded to hydrogen) #### Question 17: **Task:** Select the major product of the following reaction. **Reaction:** Cyclohexene reacts with HBr. **Options:** a) Cyclohexyl bromide (bromine attached directly to the cyclohexane ring) b) Cyclohexanol (OH group attached to the cyclohexane ring) c) 3-Bromocyclohexanol (bromine attached at the third carbon of cyclohexanol) d) 1-Bromocyclohexane (bromine attached at the end of a linear hexane chain) #### Question 18: **Task:** What is the IUPAC name of the following compound? **Structure:** The compound has a seven-carbon chain with a hydroxyl group on the fifth carbon and a bromine atom on the second carbon. The stereochemistry is specified at the chiral centers. **Options:** a) (2R,5R)-2-bromoheptan-5-ol b) (2S,5S)-2-bromoheptan-5-ol c) (3R,6S)-6-bromoheptan-3-ol d) (3R,6R)-6-bromoheptan-3-ol #### Question 19: **Task:** Select the best reagent (or set of reagents) to accomplish the following transformation. **Reaction:** Conversion of an alkene in a cyclohexane ring to an alcohol. **Options:** a) NaOH, H₂O b) i) BH₃∙THF; ii) NaOH(aq), H₂O₂ c) i) Hg(OAc)₂, H₂O; ii) NaBH₄ d)
Transcribed Image Text:### Educational Content Transcription #### Question 16: **Task:** Select the structure formed by the reaction step shown below. **Diagram Description:** A reaction mechanism featuring a carbon chain where an oxygen atom attacks a proton. The curved arrow indicates the movement of electrons from the oxygen to the hydrogen. **Options:** a) ![Option A](with a positive charge on oxygen after reaction) b) ![Option B](oxygen with an electron lone pair and no charge) c) ![Option C](oxygen bonded to hydrogen with lone pairs) d) ![Option D](oxygen with a positive charge bonded to hydrogen) #### Question 17: **Task:** Select the major product of the following reaction. **Reaction:** Cyclohexene reacts with HBr. **Options:** a) Cyclohexyl bromide (bromine attached directly to the cyclohexane ring) b) Cyclohexanol (OH group attached to the cyclohexane ring) c) 3-Bromocyclohexanol (bromine attached at the third carbon of cyclohexanol) d) 1-Bromocyclohexane (bromine attached at the end of a linear hexane chain) #### Question 18: **Task:** What is the IUPAC name of the following compound? **Structure:** The compound has a seven-carbon chain with a hydroxyl group on the fifth carbon and a bromine atom on the second carbon. The stereochemistry is specified at the chiral centers. **Options:** a) (2R,5R)-2-bromoheptan-5-ol b) (2S,5S)-2-bromoheptan-5-ol c) (3R,6S)-6-bromoheptan-3-ol d) (3R,6R)-6-bromoheptan-3-ol #### Question 19: **Task:** Select the best reagent (or set of reagents) to accomplish the following transformation. **Reaction:** Conversion of an alkene in a cyclohexane ring to an alcohol. **Options:** a) NaOH, H₂O b) i) BH₃∙THF; ii) NaOH(aq), H₂O₂ c) i) Hg(OAc)₂, H₂O; ii) NaBH₄ d)
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