Isotopes and Molecular Composition Quiz
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Isotopes and Molecular Composition Quiz

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@WellReceivedPinkTourmaline

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Questions and Answers

What is the intensity of the M + 1 peak for the molecular ion derived from methane?

  • 1.18% (correct)
  • 1.12%
  • 0.06%
  • 0.015%

    • How many molecules of methane out of 100 have the nominal mass of 17?

  • Negligible (correct)
  • 1.18
  • 1.12
  • 0.06

    • What method is employed for determining the molecular formula based on the measurement of the relative intensities of the isotope peaks?

  • High-resolution mass spectrometer
  • Nuclear magnetic resonance spectroscopy
  • Gas chromatography
  • Low-resolution mass spectrometer (correct)

    • How are the data about the relative natural abundance of stable isotopes presented in Table 5.2?

    <p>As a percentage of the total isotopes present and as a percentage of the most abundant isotope</p> Signup and view all the answers

    What is the chance of finding an H isotope in a molecule of methane compared to finding a C isotope?

    <p>Four times greater</p> Signup and view all the answers

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