4) C6H140 MS Analysis Understanding Check (Spectrum) - The relatively large size of the peak at m/z73 implies that the fragment that causes it is: a, small but stabilized notably by resonance; b, large but stabilized notably by resonance - The loss of a neutral ethyl fragment and the formation of a charged fragment stabilized by resonance at m/z73 indicate that the OH group is located on C#:a,1;b, 2;c,3 in the chain of the molecule