In the chemical ionization mass spectrum of pentobarbital, shown earlier, the peak with the most significant intensity a

[answerhappygod]

In the chemical ionization mass spectrum of pentobarbital, shown
earlier, the peak with the most significant intensity at the high
end of the mass spectrum at m/z 227 is suspected to be MH+. If this
is correct, the nominal mass is 226. The intensity of the peak at
m/z 228 is ~12.08% of the peak at 227. The nitrogen rule tells us
that since the molecule has an even mass there must be an even
number of nitrogens. You know from the chemical analysis of the
sample it contains only C, H, N, and O. • How many carbon atoms
would you suspect there are in the molecule?