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The Mass Spectrometer. In order to measure the characteristics of individual molecules, a mass spectrometer converts them to ions so that they can be moved about and manipulated by external electric and magnetic fields. The three essential functions of a mass spectrometer, and the associated components, are:
Go back and review them if you need to, because if you can't do that stuff, you can't do stoichiometry. The Steps Involved in Solving Mass-Mass Stoichiometry Problems. 1  Make sure the chemical equation is correctly balanced. 2  Using the molar mass of the given substance, convert the mass given in the problem to moles.