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11 Dec 2019

What is the percent composition of the major enantiomer in a mixture of enantiomers that has a specific rotation that is 40% if the specific rotation of its pure enantiomers?

A) 60%
B) 70%
C) 80%
D) 90%
E) not a-d

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Beverley Smith
Beverley SmithLv2
13 Dec 2019

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Related questions

PART A. A 1:4 mixture of the (R) and (S)-enantiomers of compound A has a specific rotation of +40o.

I) Calculate the enantiomeric excess for this mixture.

II) What is the specific rotation for the pure (R)-enantiomer?

III) Calculate the specific rotation for a 9:1 mixture of the (R)- and (S)-enantiomers of A.

PART B. The pure (S)-enantiomer of compound B has a specific rotation of +60o.

I) Calculate the specific rotation for a 2:1 mixture of (R) and (S)-enantiomers of B.

PART C. Another sample of B has a specific rotation of -5o.

I) What is the % (R)-B and %(S)-B present in the sample?

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