24. A radioactive substance weighing 18.00 grams undergoes radioactive decay in 12.5 days and has only 0.562 grams remaining, what is the half-life of this substance? (8 Sam C.8 or TEI muies 25. A radioactive substance weighs1.0 gram after 40.0 minutes and has a half-life of 10.0 minutes, how much did it weigh initially? sw o
24. A radioactive substance weighing 18.00 grams undergoes radioactive decay in 12.5 days and has only 0.562 grams remaining, what is the half-life of this substance? (8 Sam C.8 or TEI muies 25. A radioactive substance weighs1.0 gram after 40.0 minutes and has a half-life of 10.0 minutes, how much did it weigh initially? sw o
Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter18: The Nucleus: A Chemist's View
Section: Chapter Questions
Problem 28E
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I need help on these 2 half life problems. Please show steps. Thank you
Transcribed Image Text:24. A radioactive substance weighing 18.00 grams undergoes radioactive decay in 12.5 days and has
only 0.562 grams remaining, what is the half-life of this substance? (8
Som C.8 or TEI muies
25. A radioactive substance weighs1.0 gram after 40.0 minutes and has a half-life of 10.0
minutes, how much did it weigh initially?
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