Iodine-131 is a radioactive isotope that is used to diagnose and treat some forms of thyroid cancer. Iodine-131 decays to xenon-131, according to the equation below. iodine-131→xenon-131+electron The decay is first order with a rate constant of 0.138 d−1. All radioactive decay is first order. How many days will it take for 67.0% of the iodine-131 in a 0.400 M solution of this substance to decay to xenon-131? 8.03 days 2.90 days 4.86 days 0.0239 day
Iodine-131 is a radioactive isotope that is used to diagnose and treat some forms of thyroid cancer. Iodine-131 decays to xenon-131, according to the equation below. iodine-131→xenon-131+electron The decay is first order with a rate constant of 0.138 d−1. All radioactive decay is first order. How many days will it take for 67.0% of the iodine-131 in a 0.400 M solution of this substance to decay to xenon-131? 8.03 days 2.90 days 4.86 days 0.0239 day
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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Iodine-131 is a radioactive isotope that is used to diagnose and treat some forms of thyroid cancer. Iodine-131 decays to xenon-131, according to the equation below.
iodine-131→xenon-131+electron
The decay is first order with a rate constant of 0.138 d−1. All radioactive decay is first order. How many days will it take for 67.0% of the iodine-131 in a 0.400 M solution of this substance to decay to xenon-131?
8.03 days
2.90 days
4.86 days
0.0239 day
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