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A worker in a laboratory unknowingly became exposed to a sample of radio-labeled sodium iodide made from iodine-131 (beta emitter, t1/2 = 8.07 days). The mistake was realized 28 days after the accidental exposure, at which time the activity of the sample was 25.6 × 10-5 Ci/g. The safety officer needed to know how active the sample was at the time of the exposure. Calculate the activity value in Ci/g.

A worker in a laboratory unknowingly became exposed to a sample of radio-labeled sodium iodide made from iodine-131 (beta emitter, t1/2 = 8.07 days). The mistake was realized 28 days after the accidental exposure, at which time the activity of the sample was 25.6 × 10-5 Ci/g. The safety officer needed to know how active the sample was at the time of the exposure. Calculate the activity value in Ci/g.

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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A worker in a laboratory unknowingly became exposed to a sample of radio-labeled sodium iodide made from iodine-131 (beta emitter, t1/2 = 8.07 days). The mistake was realized 28 days after the accidental exposure, at which time the activity of the sample was 25.6 × 10-5 Ci/g. The safety officer needed to know how active the sample was at the time of the exposure.

Calculate the activity value in Ci/g.

A worker in a laboratory unknowingly became exposed to a sample of radio-labeled sodium iodide made from iodine-131 (beta emitter, t1/2 = 8.07 days). The mistake was realized 28 days after the accidental exposure, at which time the activity of the sample was 25.6 x 105 Ci/g. The safety officer needed to know how active the sample was at the time of the exposure. Part 1 Your answer is correct. Choose the equations needed to calculate the activity. O In ([A]/[A]!) = kt In ([A],[A]) = kt k = In2 /t1/2 k = t1/2 In2 eTextbook and Media Hint Attempts: 2 of 15 used Part 2 Calculate the activity value in Ci/g. i Ci/g
Transcribed Image Text:A worker in a laboratory unknowingly became exposed to a sample of radio-labeled sodium iodide made from iodine-131 (beta emitter, t1/2 = 8.07 days). The mistake was realized 28 days after the accidental exposure, at which time the activity of the sample was 25.6 x 105 Ci/g. The safety officer needed to know how active the sample was at the time of the exposure. Part 1 Your answer is correct. Choose the equations needed to calculate the activity. O In ([A]/[A]!) = kt In ([A],[A]) = kt k = In2 /t1/2 k = t1/2 In2 eTextbook and Media Hint Attempts: 2 of 15 used Part 2 Calculate the activity value in Ci/g. i Ci/g
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