Identify this substance!
IR spectrum
Mass spectrum
NMR spectrum
IR: $O-H$ large band, $C=O$ bande: Carboxylic acid Mass: $COOH^+$, $CH_3CH_2^+$,$CH_3CH_2CO^+$ NMR : - quadruplet: 3 neighbouring H atoms, - triplet: 2 neighbouring H atoms! It's propanoic acid: $CH_3CH_2COOH$