If an element, El, has two isotopes with the masses and abundances listed below: 72El: 72.1961 amu; 63.916% 80El: 80.5373 amu; 36.084% What would the molar mass be? What is the identity of the element?

Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter2: Atoms Molecules And Ions
Section2.2: Isotopes And Atomic Weight
Problem 2.3CYU: Neon has three stable isotopes, one with a small abundance. What are the abundances of the other two...
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If an element, El, has two isotopes with the masses and abundances listed below:

72El: 72.1961 amu; 63.916%

80El: 80.5373 amu; 36.084%

What would the molar mass be?

What is the identity of the element?

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