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Int (%) Int (%) 27 A) m/z B) m/z 43 100 149 44 58 69 61 148 73 74 100 4.6 5.5 150 98 151 5.3

Int (%) Int (%) 27 A) m/z B) m/z 43 100 149 44 58 69 61 148 73 74 100 4.6 5.5 150 98 151 5.3

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Determine a molecular formula for a molecule from the mass spectrometry data given:
(Please describe your thought process, thanks!)

**Mass Spectrometry Data Interpretation** The tables below represent two sets of mass spectrometry data, labeled as A) and B). Each table includes columns for mass-to-charge ratio (m/z) and the relative intensity (Int%) of the detected ions. ### Table A | m/z | Int (%) | |-----|---------| | 44 | 27 | | 58 | 61 | | 73 | 100 | | 74 | 4.6 | ### Table B | m/z | Int (%) | |-----|---------| | 69 | 43 | | 148 | 100 | | 149 | 5.5 | | 150 | 98 | | 151 | 5.3 | **Explanation of the Data:** - **Mass-to-Charge Ratio (m/z)**: This value represents the ratio of the mass of an ion to its charge. It is one of the primary indicators used in mass spectrometry to identify and quantify compounds. - **Relative Intensity (Int%)**: This percentage describes the strength of each ion signal detected in the spectrometer. The most intense peak is normalized to 100%, and all other peaks are scaled relative to this peak. **Highlights:** - **In Table A**: - The ion with m/z value 73 has the highest relative intensity at 100%. - The ion with m/z value 58 has a significant intensity of 61%. - Lower intensities are observed for ions with m/z values 44 (27%) and 74 (4.6%). - **In Table B**: - The ion with m/z value 148 is the most intense peak, with a relative intensity of 100%. - The ion with m/z value 150 also shows a high intensity at 98%. - The ions with m/z values 69, 149, and 151 have lower intensities (43%, 5.5%, and 5.3% respectively). Understanding these tables can help in identifying unknown compounds or verifying the presence of known substances based on their characteristic fragmentation patterns in the mass spectrometer.
Transcribed Image Text:**Mass Spectrometry Data Interpretation** The tables below represent two sets of mass spectrometry data, labeled as A) and B). Each table includes columns for mass-to-charge ratio (m/z) and the relative intensity (Int%) of the detected ions. ### Table A | m/z | Int (%) | |-----|---------| | 44 | 27 | | 58 | 61 | | 73 | 100 | | 74 | 4.6 | ### Table B | m/z | Int (%) | |-----|---------| | 69 | 43 | | 148 | 100 | | 149 | 5.5 | | 150 | 98 | | 151 | 5.3 | **Explanation of the Data:** - **Mass-to-Charge Ratio (m/z)**: This value represents the ratio of the mass of an ion to its charge. It is one of the primary indicators used in mass spectrometry to identify and quantify compounds. - **Relative Intensity (Int%)**: This percentage describes the strength of each ion signal detected in the spectrometer. The most intense peak is normalized to 100%, and all other peaks are scaled relative to this peak. **Highlights:** - **In Table A**: - The ion with m/z value 73 has the highest relative intensity at 100%. - The ion with m/z value 58 has a significant intensity of 61%. - Lower intensities are observed for ions with m/z values 44 (27%) and 74 (4.6%). - **In Table B**: - The ion with m/z value 148 is the most intense peak, with a relative intensity of 100%. - The ion with m/z value 150 also shows a high intensity at 98%. - The ions with m/z values 69, 149, and 151 have lower intensities (43%, 5.5%, and 5.3% respectively). Understanding these tables can help in identifying unknown compounds or verifying the presence of known substances based on their characteristic fragmentation patterns in the mass spectrometer.
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