15. Analytical Techniques:IR, NMR, Mass Spect

Which of the following best describes the most stable cation typically formed in a mass spectrometer by cleavage of a straight-chain alkane such as $C_5{H}_{12}$ (pentane)?

In mass spectrometry, what is the molecular ion ($M+$) formed when methane ($C_1{H}_4$) is ionized in the mass spectrometer?

In mass spectrometry, $\alpha$-cleavage is most commonly observed in molecules containing which of the following features?

Which of the following is the most likely base peak observed in the mass spectrum of diisopropyl ether?

What is an advantage of using $GC-MS$ (Gas Chromatography-Mass Spectrometry) in analytical chemistry?

A compound's mass spectrum shows two molecular ion peaks of equal intensity at $100$ and $102$ m/z. Does this suggest the presence of bromine in the compound?