In a Typical Mass Spectrum,a Smaller Signal Is Observed at a Mass

question 7

Multiple Choice

In a typical mass spectrum,a smaller signal is observed at a mass 1 amu higher than the molecular ion peak.Why?

• A)Due to small impurities in the sample
• B)Machine error
• C)Because a small percentage of the compound will have a carbon that is the isotope ¹³C instead of ¹²C
• D)Because of fragmentation

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