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

question 55

Multiple Choice

A pure sample of the R enantiomer of a compound has a specific rotation, [ $\alpha$ ], of +20 ^$\circ$ . A solution containing 0.2 g/mL of a mixture of enantiomers rotates plane polarized light by -2 ^$\circ$ in a 1 dm polarimeter. What is the enantiomeric excess (%ee) of the mixture?

• A)25% R
• B)40% S
• C)50% S
• D)70% R

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Definitions:

Consumer Equilibrium

A state in which a consumer has allocated their income in a way that maximizes their utility, given prices and their budget constraint.

Substitution Effect

The change in consumption patterns due to a change in the relative prices of goods, leading consumers to replace more expensive items with less expensive ones.

Income Effect

The change in an individual's or economy's consumption patterns due to a change in real income, which can result from wage changes, inflation, or taxation adjustments.

Consumer Equilibrium

The point at which the quantity of a product demanded by consumers equals the quantity supplied, leading to a state where there is no incentive for prices to change.