The specific rotation of optically pure (R)-2-butanol is +23.5.

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The specific rotation of optically pure (R)-2-butanol is +23.5. If a mixture of (R-) and(S)-2- butanol was found to have a specific rotation of -18.8:

A. Calculate the % ee of the mixture.

B. What percent of the mixture is comprised of (S)-2-butanol? What percent of the mixture is comprised of (R)-2-butanol?