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The half-life of 90Sr is 28.8 years. How long will it take (in years) for a 86.1 mg sample of 20Sr to decay to 23.6 mg of 90Sr? IMPOD TANT. Who

The half-life of 90Sr is 28.8 years. How long will it take (in years) for a 86.1 mg sample of 20Sr to decay to 23.6 mg of 90Sr? IMPOD TANT. Who

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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for a 86.1 mg sample of 90Sr to decay to 23.6 mg of 90Sr? The half-life of 90Sr is 28.8 years. How long will it take (in years) IMPORTANT: When entering your answer: • Enter the number only (no units) • Do not leave any spaces • Use a leading zero before the decimal when necessary Report your number to 1 decimal place (regardless of the significant figures) • Correctly round your answer to the 1st decimal place (allowed margin of error is only + 0.1, so always use un- rounded numbers in your calculations) If the last digit is a zero it will not display once you click away, but the answer will still be marked correct. Examples: 0.1 or 2345.6
Transcribed Image Text:for a 86.1 mg sample of 90Sr to decay to 23.6 mg of 90Sr? The half-life of 90Sr is 28.8 years. How long will it take (in years) IMPORTANT: When entering your answer: • Enter the number only (no units) • Do not leave any spaces • Use a leading zero before the decimal when necessary Report your number to 1 decimal place (regardless of the significant figures) • Correctly round your answer to the 1st decimal place (allowed margin of error is only + 0.1, so always use un- rounded numbers in your calculations) If the last digit is a zero it will not display once you click away, but the answer will still be marked correct. Examples: 0.1 or 2345.6
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