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VICChemistryQuick questions

Unit 1: How can the diversity of materials be explained?

Quick questions on Mass spectrometry as an analytical technique: VCE Chemistry Unit 1

4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is isotope patterns to know?
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These patterns are diagnostic. Seeing a 3:1 doublet of peaks two units apart almost certainly means a chlorine atom is in the molecule.
What is q1?
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Outline the four stages of operation of a mass spectrometer. [4 marks]
What is q2?
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A compound shows a molecular ion at m/z =88= 88 with an M+1M+1 peak that is 4.4%4.4\% of MM, and no significant M+2M+2. (a) Determine the number of carbon atoms. (b) Suggest a molecular formula.
What is q3?
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A mass spectrum of an unknown organic compound shows M+M^{+} at m/z =78= 78 as the base peak with no isotope cluster suggesting Cl or Br. (a) Calculate the relative molecular mass. (b) Suggest a formula consistent with the very stable base peak.

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