Answered: Radioisotope X has a half-life of 4.0…

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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Radioisotope X has a half-life of 4.0 h. Based on the figure below, if the original sample of the radioisotope was 16.00 g, what percentage of the sample would be left after 12.0 hours?Radium-223 dichloride (also called Xofigo) with a half-life of 11.4 days has been approved by the FDA to treat metastatic prostate cancer: Indicate the number of half-lives that has elapsed for a sample 45.6 days after application.

Expert Solution

Step 1: Determine the percentage of amount of X and number of half-liven elapsed from the given data:

Given,

(i) initial amount of radio isotope X = 16.00 g

Half-life = 4.0 h

Time taken for decay = 12.0 hours.

(ii) Half-life of Radium-223 dichloride = 11.4 days

Time taken for decay = 45.6 days.

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