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What observed rotation is expected when a 1.44 M solution of (R)-2-butanol is mixed with an...

What observed rotation is expected when a 1.44 M solution of (R)-2-butanol is mixed with an equal volume of a 0.720 M solution of racemic 2-butanol, and the resulting solution is analyzed in a sample container that is 1 dm long? The specific rotation of (R)-2-butanol is �13.9 degrees mL g�1 dm�1.

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