12. Rubidium is a soft, silvery-white metal that has two common isotopes, Rb and "Rb. If the abundance of Rb is 80.2% and the abundance of 7Rb is 19.8%, what is the average atomic mass of rubidium?
12. Rubidium is a soft, silvery-white metal that has two common isotopes, Rb and "Rb. If the abundance of Rb is 80.2% and the abundance of 7Rb is 19.8%, what is the average atomic mass of rubidium?
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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10. The natural abundance for boron isotopes is 19.9% 1°B and 80.1% "B. Calculate boron's atomic mass.
10.801 AMU
11. Hydrogen is 99% 'H, 0.8% ?H, and 0,2% ³H. Calculate its average atomic mass.
126.86 AMU
12. Rubidium is a soft, silvery-white metal that has two common isotopes, Rb and 87Rb. If the abundance
of 5Rb is 80.2% and the abundance of 87RD is 19.8%, what is the average atomic mass of rubidium?
13. What is the atomic mass of hafnium if, out of every 100 atoms, 5 have a mass of 176, 19 have a mass
of 177, 27 have a mass of 178, 14 have a mass of 179, and 35 have a mass of 180.0?
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