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Which statement about a mass spectrum of a molecule is correct? A Each peak represents an atom in the molecule - OCR Gateway - GCSE Chemistry - Question 14 - 2019 - Paper 4
Question 14
Which statement about a mass spectrum of a molecule is correct? A Each peak represents an atom in the molecule. B The charge to mass ratio of the molecular ion pea... show full transcript
Worked Solution & Example Answer:Which statement about a mass spectrum of a molecule is correct? A Each peak represents an atom in the molecule - OCR Gateway - GCSE Chemistry - Question 14 - 2019 - Paper 4
Step 1
D The peak on the far right of the spectrum represents the molecular ion.
Answer
In mass spectrometry, the mass spectrum displays various peaks, with the mass-to-charge ratio (m/z) plotted on the x-axis. The molecular ion peak, which corresponds to the intact molecule, is typically located at the far right side of the spectrum. This peak indicates the highest m/z value and reflects the molecular weight of the molecule in its cationic form (after losing an electron).
Thus, option D is the correct statement about a mass spectrum.