Relative masses and mass spectrometry

Relative masses and mass spectrometry Quiz

Edexcel A-Level Chemistry: Quiz

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5 questions, one answer each

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  1. 1. A sample of boron is 20% ¹⁰B and 80% ¹¹B. What is its relative atomic mass?

    • A. 10.2
    • B. 10.5
    • C. 10.8
    • D. 11.0

  2. 2. What is the m/z of the molecular ion of ³⁵Cl³⁷Cl?

    • A. 72
    • B. 70
    • C. 74
    • D. 35

  3. 3. Relative atomic mass is measured relative to which standard?

    • A. 1/16 of an atom of ¹⁶O
    • B. 1/12 of an atom of ¹²C
    • C. an atom of ¹H
    • D. a mole of ¹²C

  4. 4. What is the relative formula mass of Ca(OH)₂? (Ca = 40.1, O = 16.0, H = 1.0)

    • A. 56.1
    • B. 57.1
    • C. 73.1
    • D. 74.1

  5. 5. What are the relative heights of the peaks of the Br₂⁺ ions in bromine?

    • A. 1 : 1
    • B. 1 : 3 : 1
    • C. 1 : 2 : 1
    • D. 9 : 6 : 1

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