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29. Which of the following is TRUE of chirality? A. Compounds with chiral centers are always chiral. B. Compounds with no chiral centers are always achiral. C. Compounds with planes of symmetry are achiral. D. Choices B and C 30. If a substance has a specific rotation, it describes the substance as A. levorotatory B. dextrorotatory C. optically active D. choices A and C 31. A sample of the amino acid L-cystine has a specific rotation of -14°. Pure L- Cystine has a specific rotation of -70°. What % of each enantiomer is present in the sample? A. -14 and + 56 B. -20 and + 80 C. -60 and + 40 D. -80 and + 20 32. The molecule below can exist as Br OH A. one enantiomer B. two enantiomers C. two pairs of enantiomers D. one pair of enantiomers

29. Which of the following is TRUE of chirality? A. Compounds with chiral centers are always chiral. B. Compounds with no chiral centers are always achiral. C. Compounds with planes of symmetry are achiral. D. Choices B and C 30. If a substance has a specific rotation, it describes the substance as A. levorotatory B. dextrorotatory C. optically active D. choices A and C 31. A sample of the amino acid L-cystine has a specific rotation of -14°. Pure L- Cystine has a specific rotation of -70°. What % of each enantiomer is present in the sample? A. -14 and + 56 B. -20 and + 80 C. -60 and + 40 D. -80 and + 20 32. The molecule below can exist as Br OH A. one enantiomer B. two enantiomers C. two pairs of enantiomers D. one pair of enantiomers

Introduction to General, Organic and Biochemistry
Introduction to General, Organic and Biochemistry
11th Edition
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Chapter20: Carbohydrates
Section: Chapter Questions
Problem 20.58P
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29. Which of the following is TRUE of chirality? A. Compounds with chiral centers are always chiral. B. Compounds with no chiral centers are always achiral. C. Compounds with planes of symmetry are achiral. D. Choices B and C 30. If a substance has a specific rotation, it describes the substance as A. levorotatory B. dextrorotatory C. optically active D. choices A and C 31. A sample of the amino acid L-cystine has a specific rotation of -14°. Pure L- Cystine has a specific rotation of -70°. What % of each enantiomer is present in the sample? A. -14 and + 56 B. -20 and + 80 C. -60 and + 40 D. -80 and + 20 32. The molecule below can exist as Br OH A. one enantiomer B. two enantiomers C. two pairs of enantiomers D. one pair of enantiomers
Transcribed Image Text:29. Which of the following is TRUE of chirality? A. Compounds with chiral centers are always chiral. B. Compounds with no chiral centers are always achiral. C. Compounds with planes of symmetry are achiral. D. Choices B and C 30. If a substance has a specific rotation, it describes the substance as A. levorotatory B. dextrorotatory C. optically active D. choices A and C 31. A sample of the amino acid L-cystine has a specific rotation of -14°. Pure L- Cystine has a specific rotation of -70°. What % of each enantiomer is present in the sample? A. -14 and + 56 B. -20 and + 80 C. -60 and + 40 D. -80 and + 20 32. The molecule below can exist as Br OH A. one enantiomer B. two enantiomers C. two pairs of enantiomers D. one pair of enantiomers
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