m/z values for a given elemental composition are calculated a. using the average atomic masses commonly found in periodic tables b. using the masses of specific isotopes c. by rounding the average atomic masses to the nearest 0.1 mass units d. are independent of the charge on an ion

m/z values for a given elemental composition are calculated a. using the average atomic masses commonly found in periodic tables b. using the masses of specific isotopes c. by rounding the average atomic masses to the nearest 0.1 mass units d. are independent of the charge on an ion

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter3: Atomic Shells And Classical Models Of Chemical Bonding

Section: Chapter Questions

Problem 111CP

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m/z values for a given elemental composition are calculated
a. using the average atomic masses commonly found in periodic tables
b. using the masses of specific isotopes
c. by rounding the average atomic masses to the nearest 0.1 mass units
d. are independent of the charge on an ion

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An element consists of 1.40% of an isotope with mass 203.9730 u, 24.10% of an isotope with mass 205.9745 u, 22.10% of an isotope with mass 206.9759 u, and 52.40% of an isotope with mass 207.9766 u. a Calculate the average atomic mass. Average atomic mass = 207.216 u The average atomic mass for an unknown element is 1.40% 24.10% 22.10% x 203.9730 u + x 205.9745 u+ x 206.9759 u + 100% 100% 100% 52.40% x 207.9766 u = 2.856 u + 49.640 u + 45.742 u + 108.98 u 100% = 207.22 = 207.2 u b Identify an element.
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