We’re being asked to determine the peak in the mass spectrum of H2 which will be the smallest.
Mass Spectrometry allows you to determine the molecular weight of an unknown compound through its vaporization and ionization.
Mass spectrometer is used to determine the mass to charge ratio of an unknown compound.
Mass spectrometry is more often applied to molecules than to atoms. We will see in Chapter 3 in the textbook that the molecular weight of a molecule is the sum of the atomic weights of the atoms in the molecule. In mass spectrometry, these molecular weights are measured relative to 1/12 the mass of one atom of 12C and therefore are commonly referred to as relative masses. The mass spectrum of H2 is taken under conditions that prevent decomposition into H atoms.
The two naturally occurring isotopes of hydrogen are 1H (atomic mass = 1.00783 amu; abundance 99.9885%) and 2H (atomic mass = 2.01410 amu; abundance 0.0115%).
Which peak will be the smallest?
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What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Mass Spectrometry concept. If you need more Mass Spectrometry practice, you can also practice Mass Spectrometry practice problems.