28. I A certain element consists of two stable isotopes. The first has an atomic mass of 137.9068 amu and a percent natural abun- dance of 0.09%. The second has an atomic mass of 138.9061 amu and a percent natural abundance of 99.91%. What is the atomic mass of the element?

28. I A certain element consists of two stable isotopes. The first has an atomic mass of 137.9068 amu and a percent natural abun- dance of 0.09%. The second has an atomic mass of 138.9061 amu and a percent natural abundance of 99.91%. What is the atomic mass of the element?

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

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

28. I A certain element consists of two stable isotopes. The first
has an atomic mass of 137.9068 amu and a percent natural abun-
dance of 0.09%. The second has an atomic mass of 138.9061 amu
and a percent natural abundance of 99.91%. What is the atomic
mass of the element?

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