A Pure Sample of the R Enantiomer of a Compound $\degree$

question 20

Multiple Choice

A pure sample of the R enantiomer of a compound has a specific rotation, [a], of -15 $\degree$ . A solution containing 0.6 g/mL of a mixture of enantiomers rotates plane polarized light by -3 $\degree$ in a 1 dm polarimeter. What is the enantiomeric excess (%ee) of the mixture?

• A) 33% R
• B) 33% S
• C) 50% R
• D) 75% R

---

Definitions:

Rhinitis

Inflammation of the nasal mucosa.

Mouth Diseases

A broad category of conditions that affect the oral cavity, including gums, teeth, tongue, and the mucous membrane, ranging from cavities to oral cancer.

Hyperglycemia

A condition characterized by an abnormally high level of glucose (sugar) in the blood, commonly associated with diabetes.

Diabetic Retinopathy

A diabetes complication that affects eyes, caused by damage to the blood vessels of the retina, leading to vision impairment.