Paper 3 · mass spectrometry

The graph shows the mass spectrum of an organic compound X. Which peak represents the relative molecular mass of X?

AA (43)

BB (77)

CC (105)

DD (120)

Explanation: The marking scheme gives answer D. The molecular ion peak (highest m/z) represents the relative molecular mass. Peak D at 120 is the molecular ion peak.

ZIMSEC Chemistry Paper 3, November 2009, Q1

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The graph shows the mass spectrum of an organic compound X. Which peak represents the relative molecular mass of X?

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