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8. In an NMR study of a sample of polystyrene, it was determined that (mm) = 0.40 and (mr) = 0.10. What is the

8. In an NMR study of a sample of polystyrene, it was determined that (mm) = 0.40 and (mr) = 0.10. What is the % isotacticity of this sample? A. 25% B. 50% C. 45% D. 30%

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