For the given molecule $(M=58),$ do you expect the more abundant peak to be $\frac{m}{z}15$ or $\frac{m}{z}43?$

Explain.

$C{H}_3-C{H}_2-C{H}_2-C{H}_3$

For the given molecule $(M=74),$ which peak do you expect to be most abundant: $\frac{m}{z}31,\frac{m}{z}45$ or $\frac{m}{z}59?$

Explain.

$HO-C{H}_2-C{H}_2-C{H}_2-C{H}_3$

Explain why the mass spectra of methyl ketones typically have a peak at $\frac{m}{z}43.$ Provide the structure of

this fragment.

How could you use mass spectrometry to distinguish between the following two compounds $(M=73)?$

Provide structures $($and $\frac{m}{z}$ values$)$ for the signif icant fragments expected.

$C{H}_3-C{H}_2-C{H}_2-C{H}_2-N{H}_2$ and $C{H}_3-C{H}_2-C{H}_2-NH-C{H}_3$

What would be the $\frac{m}{z}$ ratio for the fragment resulting from a McLafferty Rearrangement for the

following molecule $(M=100)?$ What fragment accounts for its base peak at $\frac{m}{z}57?$