1. The problem statement, all variables and given/known data Why may the specific rotation of a sample of (R)-(+)-limonene be less than the literature value of (R)-(+)-limonene. Assume that there are so (S) enantiomers present. 2. Relevant equations 3. The attempt at a solution There are no (S) enantiomers, but there are some molecules of methylene chloride mixed into the sample that was analyzed. But since these are achiral, I dont understand why they should affect the rotation of the limonene.