In a mass spectrometer positive ions are produced when a
In a mass spectrometer, positive ions are produced when a gaseous mixture is ionized by electron bombardment produced by an electric discharge. When the electric-discharge voltage is low, singly positive ions are produced and the following peaks are observed in the mass spectrum:
Mass (amu) Relative Intensity
32..................................................... 0.3743
34..................................................... 0.0015
40...................................................... 1.0000
When the electric discharge is increased, still only singly charged ions are produced, but now the peaks observed in the mass spectrum are
Mass (amu) Relative Intensity
16..................................................... 0.7500
18...................................................... 0.0015
40 ..................................................... 1.0000
What does the gas mixture consist of, and what is the percent composition by isotope of the mixture?
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