1. What expected fragments in the mass spec would allow you to distinguish butanal (1) from butanone (2) ? (1) (2) 2. If you were to use IR to monitor the reduction of a ketone to an alcohol, what changes in absorptions would you expect to observe? 3. How many signals would you expect each of the following molecules to have in its H and 13C spectrum (non-equivalent protons or carbons, do not consider splitting)? a. b. HO 13C d. c. "H 13C 13C 4. How would spin-spin splitting allow you to differentiate the 4-methyl from the terminal methyls (1 and 7) in 4-methylheptane