Hospitals use radioactive tracers in many medical tests. After the tracer is used, it must be stored as radioactive waste until its radioactivity has decreased enough for it to be disposed of as ordinary chemical waste. For the radioactive isotope iodine-131, the proportion of radioactivity remaining after t days is e−0.087t. † How soon will the proportion of radioactivity decrease to 0.002 so that it can be disposed of as ordinary chemical waste? (Round your answer to the nearest day.) days
Hospitals use radioactive tracers in many medical tests. After the tracer is used, it must be stored as radioactive waste until its radioactivity has decreased enough for it to be disposed of as ordinary chemical waste. For the radioactive isotope iodine-131, the proportion of radioactivity remaining after t days is e−0.087t. † How soon will the proportion of radioactivity decrease to 0.002 so that it can be disposed of as ordinary chemical waste? (Round your answer to the nearest day.) days
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter25: Nuclear Chemistry
Section25.4: Rates Of Nuclear Decay
Problem 25.5CYU
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Hospitals use radioactive tracers in many medical tests. After the tracer is used, it must be stored as radioactive waste until its radioactivity has decreased enough for it to be disposed of as ordinary chemical waste. For the radioactive isotope iodine-131, the proportion of radioactivity remaining after t days is e−0.087t.
† How soon will the proportion of radioactivity decrease to 0.002 so that it can be disposed of as ordinary chemical waste? (Round your answer to the nearest day.)
days
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