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4. After 24.0 days, 2.00 grams of an original 128.0 gram sample remain. a. How many half-lives passed during the 24 days? b. How many days is ONE half-life of the sample?

4. After 24.0 days, 2.00 grams of an original 128.0 gram sample remain. a. How many half-lives passed during the 24 days? b. How many days is ONE half-life of the sample?

Chemistry: Matter and Change
Chemistry: Matter and Change
1st Edition
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter24: Nuclear Chemistry
Section24.2: Radioactive Decay
Problem 17SSC
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4. After 24.0 days, 2.00 grams of an original 128.0 gram sample remain. a. How many half-lives passed during the 24 days? b. How many days is ONE half-life of the sample? 5. The half-life of iodine-131 is 8.1 days. How much of a 400 g sample of iodine-131 will remain after 40.5 days.
Transcribed Image Text:4. After 24.0 days, 2.00 grams of an original 128.0 gram sample remain. a. How many half-lives passed during the 24 days? b. How many days is ONE half-life of the sample? 5. The half-life of iodine-131 is 8.1 days. How much of a 400 g sample of iodine-131 will remain after 40.5 days.
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