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How many days would it take for one-fourth of the sample to decay? 37.5 days time: Incorrect

How many days would it take for one-fourth of the sample to decay? 37.5 days time: Incorrect

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter20: Nuclear Chemistry
Section: Chapter Questions
Problem 20.23QP
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Iridium-192 is one radioisotope used in brachytherapy, in which a radioactive source is placed inside a patient's body to treat cancer. Brachytherapy allows the use of a higher than normal dose to be placed near the tumor while lowering the risk of damage to healthy tissue. Iridium-192 is often used in the head or breast. Use the radioactive decay curve of iridium-192 to answer the three questions. 100 90 80 70 60 50- 40 30 20 10- 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 Time (days) If the initial sample is 3.25 g, what mass of the original iridium-192 remains after 150 days? mass remaining: 0.813 Estimate the half-life of the radioisotope. half-life: 75 days How many days would it take for one-fourth of the sample to decay? 37.5 time: days Incorrect Sample remaining (%)
Transcribed Image Text:Iridium-192 is one radioisotope used in brachytherapy, in which a radioactive source is placed inside a patient's body to treat cancer. Brachytherapy allows the use of a higher than normal dose to be placed near the tumor while lowering the risk of damage to healthy tissue. Iridium-192 is often used in the head or breast. Use the radioactive decay curve of iridium-192 to answer the three questions. 100 90 80 70 60 50- 40 30 20 10- 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 Time (days) If the initial sample is 3.25 g, what mass of the original iridium-192 remains after 150 days? mass remaining: 0.813 Estimate the half-life of the radioisotope. half-life: 75 days How many days would it take for one-fourth of the sample to decay? 37.5 time: days Incorrect Sample remaining (%)
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