In the mass spectrum of an organic compound, the molecular ion occurs at m/e of 86. Which of the following could be the empirical formula of the compound?

Correct answer: B. C5H11N

  • A. C2H4
  • B. C5H11N
  • C. C7H13O
  • D. C2H5F

Explanation

b) C5H11N:The molecular ion occurs at m/e 86. The empirical formula C5H11N corresponds to the compound pentylamine, which has a molecular mass of 87 g/mol. The molecular ion at m/e 86 is close to the molecular mass of pentylamine, so it is possible that this compound could have a molecular ion at m/e 86. Therefore, option b) C5H11N could be a possible empirical formula.

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