Identify this substance!
IR spectrum
Mass spectrum
NMR spectrum
IR: $C=O$ band Mass: $CH_3CO^+$, $CH_3CH_2^+$,$CH_3CH_2CO^+$ NMR : - singulet: H atoms not coupled, - quadruplet: 3 neigbouring H atoms, - triplet: 2 neigbouring H atoms! It's butanone: $CH_3CH_2COCH_3$