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Worksheetsmass spectrometry
Total questions: 16
Worksheet time: 9mins
What substance does this mass spectra represent?
hexane
pentane
butane
pentene
What cation does the "83" peak represent?
CH3COCHC
CH3COCHCCH2
CH3COCHCCH3
CH3COC
In this mass spectra what does the M+1 and M+2 peaks represent?
They represent the molecular ion that contains C isotope 13 and 14.
They represent other fragments of the molecular ion.
They represent the base peak.
They represent isotopes of Carbon (13 and 14).
What does the M+2 peak represent?
The mass spectra is not for 2-chloropropane
The M+2 peak is wrong.
80 is the molecular mass of the 2-chloroproane where Cl is isotope 35
80 is the molecular mass of the 2-chloroproane where Cl is isotope 37
What is an analytical technique?
A procedure that uses machines.
A procedure that allows you to investigate a known compound
A procedure that allows you to investigate an unknown substance and discover its identity.
A procedure that allows you to discover new elements.
What ratio does the mass spectrometer detect?
mass of main radical
mass of molecular ion
charge to mass ratio
mass to charge ratio
What species does the molecular ion break down to?
Cations
Radical and cation
Radicals
Radical and anion
Why do the fragments help us to identify the molecule?
The cations allow us only to identify the molecular mass.
It is not possible to identify the exact final molecule.
Because knowing all possible fragments help us to identify branches and possible isomers.
Because the fragments allow us to identify the different atoms that make up the molecule.
