Determine the molecular formula for each of the following:

b. a compound that contains C, H, and one O and has a molecular ion with an m/z value of 100

Suppose we have some optically pure (R)-2-butyl acetate that has been 'labeled' with the heavy ¹⁸O isotope at one oxygen atom as shown.

(c) Explain how you would prove experimentally where the ¹⁸O label appears in the products. (¹⁸O is not radioactive.)

What is the most likely m/z value for the base peak in the mass spectrum of 3-methylpentane?

The IR and mass spectra for three different compounds are shown below. Identify each compound.

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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?