With the HNMR the two CH3\'s are chemically equivalent so they only give off one peak for both. The peak will be a singlet indicating they have no other neighboring hydrogens near them. I would expect it to look like this...http://www.muhlenberg.edu/depts/chemistry/chem201woh/1Hacetone.html With the CNMR I would expect to see a signal in the range of 205-220 because of a chemical shift for this specific type of carbon ( R-C=O-R). The two R\'s in this instant are chemically equivalent when in comes to environment so they will give off one signal for two carbons and since they are Sp3 they should be within the range of 0-50ppm and this signal will be much taller than the C=O carbon. Solution With the HNMR the two CH3\'s are chemically equivalent so they only give off one peak for both. The peak will be a singlet indicating they have no other neighboring hydrogens near them. I would expect it to look like this...http://www.muhlenberg.edu/depts/chemistry/chem201woh/1Hacetone.html With the CNMR I would expect to see a signal in the range of 205-220 because of a chemical shift for this specific type of carbon ( R-C=O-R). The two R\'s in this instant are chemically equivalent when in comes to environment so they will give off one signal for two carbons and since they are Sp3 they should be within the range of 0-50ppm and this signal will be much taller than the C=O carbon..