### Chemistry Quiz Questions**Question 9:**How many chiral centers are present in a molecule of 1,3-dimethylcyclohexane?- (A) 0- (B) 1 *(Correct Answer)*- (C) 2- (D) 3**Question 10:**What is the percent composition of a mixture of (S)-(+)-2-butanol, \([α]_D = +13.52°\), and (R)-(-)-2-butanol, \([α]_D = -13.52°\), with a specific rotation \([α]_D = -6.76°\)?- (A) 75%R 25%S- (B) 25%R 75%S- (C) 50%R 50%S- (D) 67%R 33%S *(Correct Answer)*This information is invaluable for understanding the concepts of chirality in organic molecules and the calculation of optical activity to determine the composition of enantiomers in a mixture.

Answered: Image /qna-images/answer/dd8b289d-4c7b-4e29-b6c4-008908333f99.jpg

(9) How many chiral centers are present in a molecule of 1,3-dimethylcyclohexane? (C) 2 (D) 3 1 (A) 0 (10) What is the percent composition of a mixture of (S)-(+)-2-butanol, [a]p = +13.52°, and (R)-(-)-2-butanol, [a] = -13.52°, with a specific rotation [a]D = -6.76° (A) 75%R 25%S (B) 25%R 75%S (C) 50%R 50%S D) 67%R 33%S

(9) How many chiral centers are present in a molecule of 1,3-dimethylcyclohexane? (C) 2 (D) 3 1 (A) 0 (10) What is the percent composition of a mixture of (S)-(+)-2-butanol, [a]p = +13.52°, and (R)-(-)-2-butanol, [a] = -13.52°, with a specific rotation [a]D = -6.76° (A) 75%R 25%S (B) 25%R 75%S (C) 50%R 50%S D) 67%R 33%S

Chemistry: Matter and Change

1st Edition

ISBN:9780078746376

Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Chapter21: Hydrocarbons

Section: Chapter Questions

Problem 94A

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