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In ¹H NMR, increased electron density in a C-H sigma bond causes A. Deshielding and an increased precessional frequency. B. Shielding and an increased precessional frequency. C. Deshielding and a decreased precessional frequency. D. Shielding and a decreased precessional frequency. A mass spectrum will show an M+2 peak molecular about 1/3 the intensity of the molecular peak if A. the molecule contains chlorine. B. the molecule contains an odd number of nitrogen atoms. C. the molecular ion is unstable. D. the molecule contains an even number of nitrogen atoms. E. the molecule contains bromine. Which of the following compounds would be expected to show a mass spectrum with a molecular ion having an odd mass-to-charge ratio? I. NH Br CI -Br H₂N NH2 III. IV. II. NH₂ A. I only B. II only C. III only D. IV only E. more than one of the above

In ¹H NMR, increased electron density in a C-H sigma bond causes A. Deshielding and an increased precessional frequency. B. Shielding and an increased precessional frequency. C. Deshielding and a decreased precessional frequency. D. Shielding and a decreased precessional frequency. A mass spectrum will show an M+2 peak molecular about 1/3 the intensity of the molecular peak if A. the molecule contains chlorine. B. the molecule contains an odd number of nitrogen atoms. C. the molecular ion is unstable. D. the molecule contains an even number of nitrogen atoms. E. the molecule contains bromine. Which of the following compounds would be expected to show a mass spectrum with a molecular ion having an odd mass-to-charge ratio? I. NH Br CI -Br H₂N NH2 III. IV. II. NH₂ A. I only B. II only C. III only D. IV only E. more than one of the above

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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In ¹H NMR, increased electron density in a C-H sigma bond causes A. Deshielding and an increased precessional frequency. B. Shielding and an increased precessional frequency. C. Deshielding and a decreased precessional frequency. D. Shielding and a decreased precessional frequency. A mass spectrum will show an M+2 peak molecular about 1/3 the intensity of the molecular peak if A. the molecule contains chlorine. B. the molecule contains an odd number of nitrogen atoms. C. the molecular ion is unstable. D. the molecule contains an even number of nitrogen atoms. E. the molecule contains bromine. Which of the following compounds would be expected to show a mass spectrum with a molecular ion having an odd mass-to-charge ratio? I. NH Br CI -Br H₂N NH2 III. IV. II. NH₂ A. I only B. II only C. III only D. IV only E. more than one of the above
Transcribed Image Text:In ¹H NMR, increased electron density in a C-H sigma bond causes A. Deshielding and an increased precessional frequency. B. Shielding and an increased precessional frequency. C. Deshielding and a decreased precessional frequency. D. Shielding and a decreased precessional frequency. A mass spectrum will show an M+2 peak molecular about 1/3 the intensity of the molecular peak if A. the molecule contains chlorine. B. the molecule contains an odd number of nitrogen atoms. C. the molecular ion is unstable. D. the molecule contains an even number of nitrogen atoms. E. the molecule contains bromine. Which of the following compounds would be expected to show a mass spectrum with a molecular ion having an odd mass-to-charge ratio? I. NH Br CI -Br H₂N NH2 III. IV. II. NH₂ A. I only B. II only C. III only D. IV only E. more than one of the above
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