8) How much of the S-enantiomer is present in 10 g of a mixture which has an enantiomericexcess of 20% of the R-enantiomer?A) 2 gB) 3 gC) 4 gD) 5 gE) 6 g9) A solution of 0.2 g/ml of a pure R-enantiomer in a 1 dm polarimeter sample tube rotates plane ofpolarized light by +5. What is the rotation observed on this solution in a 2dm polarimeter sample tube?A) 0B) -5C) 10D) -10E) 5

Given: 10 g of a mixture with enantiomeric excess of 20% of the R-enantiomer. To find: Mass of…

Answered: 8) How much of the S-enantiomer is…

8) How much of the S-enantiomer is present in 10 g of a mixture which has an enantiomeric excess of 20% of the R-enantiomer? A) 2 g B) 3 g C) 4 g D) 5 g E) 6 g

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter5: Stereochemistry At Tetrahedral Centers

Section5.3: Optical Activity

Problem 6P

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Concept explainers

Alkanes and Cycloalkanes

Alkanes are saturated organic compounds which are made up of C and H atoms. Alkanes have the general formula of CnH2n+2. Alkane contains sp3 hybridized carbon atoms with four sigmas (σ) bonds & every hydrogen atom is connected with one of the carbon atoms. The size of the alkane could be determined by the number of carbon atoms located in it.

Question

8) How much of the S-enantiomer is present in 10 g of a mixture which has an enantiomeric
excess of 20% of the R-enantiomer?
A) 2 g
B) 3 g
C) 4 g
D) 5 g
E) 6 g
9) A solution of 0.2 g/ml of a pure R-enantiomer in a 1 dm polarimeter sample tube rotates plane of
polarized light by +5. What is the rotation observed on this solution in a 2dm polarimeter sample tube?
A) 0
B) -5
C) 10
D) -10
E) 5

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