QUESTION Bromine has two isotopes, 79Br and 81B.. To find out the isotopic abundance of each bromine isotope, a sample of Br, was injected to a mass spectrometer which subsequently released the spectra shown below. From each spectrum height was measured and tabulated. Explain why there are five peaks despite that bromine has only two isotopes. Hint: Read carefully the description of mass spectrometer in the previous Question #5, “How to find isotopic abundance?", especially the phrase in red! DATA Mass Number Peak height, cm 79 4.12 81 4.12 158 3.34 160 6.68 162 3.34 79 81 158 160 162 MASS, amu Relative Abundance

Chemistry: Principles and Reactions
8th Edition
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Author:William L. Masterton, Cecile N. Hurley
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Chapter2: Atoms, Molecules, And Ions
Section: Chapter Questions
Problem 30QAP: Chlorine has two isotopes, Cl-35 and Cl-37. Their abundances are 75.53% and 24.47%, respectively....
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Bromine has two isotopes, 79Br and 81Br. To find out the isotopic abundance of each bromine isotope,
a sample of Br, was injected to a mass spectrometer which subsequently released the spectra shown
below. From each spectrum height was measured and tabulated.
Explain why there are five peaks despite that bromine has only two isotopes.
Hint: Read carefully the description of mass spectrometer in the previous Question #5, "How to find
isotopic abundance?", especially the phrase in red!
DATA
Mass Number
Peak height, cm
79
4.12
81
4.12
158
3.34
160
6.68
162
3.34
79
81
158
160
162
MASS, amu
Relative Abundance
Transcribed Image Text:QUESTION Bromine has two isotopes, 79Br and 81Br. To find out the isotopic abundance of each bromine isotope, a sample of Br, was injected to a mass spectrometer which subsequently released the spectra shown below. From each spectrum height was measured and tabulated. Explain why there are five peaks despite that bromine has only two isotopes. Hint: Read carefully the description of mass spectrometer in the previous Question #5, "How to find isotopic abundance?", especially the phrase in red! DATA Mass Number Peak height, cm 79 4.12 81 4.12 158 3.34 160 6.68 162 3.34 79 81 158 160 162 MASS, amu Relative Abundance
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