4) The mass spectrum of which compound has an M+2 peak that has intensity that is about 4% of its M+ peak?
A) (CH3CH2)2S
B) (CH3CH2)2O
C) CH3CH2CH2Br
D) CH3CH2CH2NH2
E) CH3CH2CH2Cl
5) Account for fragments having a m/z value of 45 and 55 in the mass spectrum of 2-hexanol by drawing structures of the fragments.