1) Chlorine has 2 stable isotopes 1-chloropropane was analysed using a mass spectrometer. How many "Molecular ion " peaks would you expect to see? a) 1 b) 2 c) 3 d) 4 2) What would be the m/z values for the molecular ion peaks for 1-chloropropane? a) 76 & 78 b) 78 & 80 c) 80 & 82 d) 78.5 & 80.5 3) Bromine has 2 stable isotopes. How many "Molecular ion peaks" would you expect from 2,2-dibromobutane? a) 1 b) 2 c) 3 d) 4 4) Bromine has 2 stable isotopes 2,2-dibromobutane gives multiple "molecular ion" peaks in mass spectrometer. All of which are the same height what does this tell you about abundance of the 2 isotopes a) They exist in as 1:1 ratio b) They exist in as 2:1 ratio c) They exist in as 4:1 ratio d) They exist in as 3:1 ratio 5) Chlorine exists as 2 stable isotopes 75% 35Cl and 25% 37Cl. What ratio would you expect to see between the 2 molecular ion peak of chloromethane. a) 1:1 b) 1:2 c) 3:1 d) 2:2

Mass Spectroscopy

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