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(3) (HAND IN) After 1010 years a radioactive substance has decayed so that seven ninths of the original amount remains. (a) What is the half-life of this substance? (b) Given that after 1012 years the amount of substance remaining is 10 units determine the original amount. (c) How long will it take until only 3/80 of the initial amount remains?

(3) (HAND IN) After 1010 years a radioactive substance has decayed so that seven ninths of the original amount remains. (a) What is the half-life of this substance? (b) Given that after 1012 years the amount of substance remaining is 10 units determine the original amount. (c) How long will it take until only 3/80 of the initial amount remains?

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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(3) (HAND IN) After 1010 years a radioactive substance has decayed so that seven ninths of the original amount remains. (a) What is the half-life of this substance? (b) Given that after 1012 years the amount of substance remaining is 10 units determine the original amount. (c) How long will it take until only 3/80 of the initial amount remains?
Transcribed Image Text:(3) (HAND IN) After 1010 years a radioactive substance has decayed so that seven ninths of the original amount remains. (a) What is the half-life of this substance? (b) Given that after 1012 years the amount of substance remaining is 10 units determine the original amount. (c) How long will it take until only 3/80 of the initial amount remains?
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