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Gallium-67 is used medically in tumor- seeking agents. The half-life of gallium- 67 is 78.2 hours. If you begin with 38.6 mg of this isotope, what mass remains after 97.8 hours have passed? mg

Gallium-67 is used medically in tumor- seeking agents. The half-life of gallium- 67 is 78.2 hours. If you begin with 38.6 mg of this isotope, what mass remains after 97.8 hours have passed? mg

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
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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Gallium-67 is used medically in tumor- seeking agents. The half-life of gallium- 67 is 78.2 hours. If you begin with 38.6 mg of this isotope, what mass remains after 97.8 hours have passed? mg
Transcribed Image Text:Gallium-67 is used medically in tumor- seeking agents. The half-life of gallium- 67 is 78.2 hours. If you begin with 38.6 mg of this isotope, what mass remains after 97.8 hours have passed? mg
Iron-59 is a radioisotope that is used to evaluate bone marrow function. The half- life of iron-59 is 44.5 days. How much time is required for the activity of a sample of iron-59 to fall to 20.1 percent of its original value? days
Transcribed Image Text:Iron-59 is a radioisotope that is used to evaluate bone marrow function. The half- life of iron-59 is 44.5 days. How much time is required for the activity of a sample of iron-59 to fall to 20.1 percent of its original value? days
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