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a. 0 35. Rubidium has two naturally occurring isotopes, Rb-85 (relative mass 84.9118 amu) with % abundance of 72.05% and Rb-87 (relative mass 86.9092 amu). What is the average atomic mass of Rubidium? a. 85.4701 amu b. 85.9105 amu C. 86.3509 amu d. 86.8911 36. Iron (average atomic mass = 55.8476 amu) has four isotopes: Fe-54, Fe-56, Fe-57, and Fe-58. The first two isotopes have a total abundance of 97.599%, and the last isotope has an abundance of 0.282%. What is the abundance of the first isotope? a. 2.119% b. 8.962% C. 10.232% d. 87.367%

a. 0 35. Rubidium has two naturally occurring isotopes, Rb-85 (relative mass 84.9118 amu) with % abundance of 72.05% and Rb-87 (relative mass 86.9092 amu). What is the average atomic mass of Rubidium? a. 85.4701 amu b. 85.9105 amu C. 86.3509 amu d. 86.8911 36. Iron (average atomic mass = 55.8476 amu) has four isotopes: Fe-54, Fe-56, Fe-57, and Fe-58. The first two isotopes have a total abundance of 97.599%, and the last isotope has an abundance of 0.282%. What is the abundance of the first isotope? a. 2.119% b. 8.962% C. 10.232% d. 87.367%

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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a. 0 b. -2 35. Rubidium has two naturally occurring isotopes, Rb-85 (relative mass 84.9118 amu) with % abundance of 72.05% and Rb-87 (relative mass 86.9092 amu). What is the average atomic mass of Rubidium? a. 85.4701 amu b. 85.9105 amu C. 86.3509 amu d. 86.8911 36. Iron (average atomic mass = 55.8476 amu) has four isotopes: Fe-54, Fe-56, Fe-57, and Fe-58. The first two isotopes have a total abundance of 97.599%, and the last isotope has an abundance of 0.282%. What is the abundance of the first isotope? a. 2.119% b. 8.962% C. 10.232% d. 87.367%
Transcribed Image Text:a. 0 b. -2 35. Rubidium has two naturally occurring isotopes, Rb-85 (relative mass 84.9118 amu) with % abundance of 72.05% and Rb-87 (relative mass 86.9092 amu). What is the average atomic mass of Rubidium? a. 85.4701 amu b. 85.9105 amu C. 86.3509 amu d. 86.8911 36. Iron (average atomic mass = 55.8476 amu) has four isotopes: Fe-54, Fe-56, Fe-57, and Fe-58. The first two isotopes have a total abundance of 97.599%, and the last isotope has an abundance of 0.282%. What is the abundance of the first isotope? a. 2.119% b. 8.962% C. 10.232% d. 87.367%
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