9. Variations in average atomic mass may be observed for elements obtained from different sources. Lithium provides an example of this. The isotopic composition of lithium from naturally occurring minerals is 7.5% "Li and 92.5% 'Li, which have masses of 6.01512 amu and 7.01600 amu, respectively. A commercial source of lithium, recycled from a military source, was 3.75% “Li (and the rest 'Li). Calculate the average atomic mass values for each of these two sources.
9. Variations in average atomic mass may be observed for elements obtained from different sources. Lithium provides an example of this. The isotopic composition of lithium from naturally occurring minerals is 7.5% "Li and 92.5% 'Li, which have masses of 6.01512 amu and 7.01600 amu, respectively. A commercial source of lithium, recycled from a military source, was 3.75% “Li (and the rest 'Li). Calculate the average atomic mass values for each of these two sources.
Chemistry by OpenStax (2015-05-04)
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ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter2: Atoms, Molecules, And Ions
Section: Chapter Questions
Problem 25E: The average atomic masses of some elements may vary, depending upon the sources of their ores....
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Transcribed Image Text:9. Variations in average atomic mass may be observed for elements obtained from different
sources. Lithium provides an example of this. The isotopic composition of lithium from
naturally occurring minerals is 7.5% Li and 92.5% 'Li, which have masses of 6.01512
amu and 7.01600 amu, respectively. A commercial source of lithium, recycled from a
military source, was 3.75% "Li (and the rest 'Li). Calculate the average atomic
mass
values for each of these two sources.
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