The half–life of a radioactive material is tH = 5.0 minutes. The initial amount of the material is 100.0 g. N = N0 e–kt    or    N = N0 (1/2)t/tH  How much material remains after 8.0 minutes?   Question 3 options:   29.0 g   27.0 g   33.0 g How much time is required for the material amount to decrease to 15.0 g?   Question 4 options:   12.4 minutes   13.7 minutes   11.8 minutes

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter19: Nuclear Chemistry
Section: Chapter Questions
Problem 51AP
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The half–life of a radioactive material is tH = 5.0 minutes. The initial amount of the material is 100.0 g.

N = N0 ekt    or    N = N0 (1/2)t/tH 

How much material remains after 8.0 minutes?

 

Question 3 options:

 

29.0 g

 

27.0 g

 

33.0 g

How much time is required for the material amount to decrease to 15.0 g?

 

Question 4 options:

 

12.4 minutes

 

13.7 minutes

 

11.8 minutes

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