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problems on H-NMR spectrum of isopentyl acetate.

1. On the attached H-NMR spectrum of isopentyl acetate, draw the structure of the compound, label the proton groups and show peak to proton group correlations.

2. What would the effect on yield be of allowing the crushed Dry Ice to be exposed to the atmosphere for long periods of time before being used? Describe your answer.

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