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How long will it take for 15% of the U-238 atoms in a sample of U-238 to decay? Express your answer in years to two significant figures. > View Available Hint(s) t = yr Submit Part B If a sample of U-238 initially contained 1.9 x 1018 atoms when the universe was formed 13.8 billion years ago, how many U-238 atoms will it contain today? Express your answer in atoms to two significant figures. > View Available Hint(s) 國] ? [U-238], = atoms

How long will it take for 15% of the U-238 atoms in a sample of U-238 to decay? Express your answer in years to two significant figures. > View Available Hint(s) t = yr Submit Part B If a sample of U-238 initially contained 1.9 x 1018 atoms when the universe was formed 13.8 billion years ago, how many U-238 atoms will it contain today? Express your answer in atoms to two significant figures. > View Available Hint(s) 國] ? [U-238], = atoms

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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The half-life for the radioactive decay of U-238 is 4.5 billion years and is independent of initial concentration.
Transcribed Image Text:The half-life for the radioactive decay of U-238 is 4.5 billion years and is independent of initial concentration.
iew | Constants | Periodic lal Part A How long will it take for 15% of the U-238 atoms in a sample of U-238 to decay? Express your answer in years to two significant figures. > View Available Hint(s) Πνα ΑΣφ 圈] t = yr Submit Part B If a sample of U-238 initially contained 1.9 x 1018 atoms when the universe was formed 13.8 billion years ago, how many U-238 atoms will it contain today? Express your answer in atoms to two significant figures. > View Available Hint(s) ΑΣΦ 國] ? [U-238], = atoms
Transcribed Image Text:iew | Constants | Periodic lal Part A How long will it take for 15% of the U-238 atoms in a sample of U-238 to decay? Express your answer in years to two significant figures. > View Available Hint(s) Πνα ΑΣφ 圈] t = yr Submit Part B If a sample of U-238 initially contained 1.9 x 1018 atoms when the universe was formed 13.8 billion years ago, how many U-238 atoms will it contain today? Express your answer in atoms to two significant figures. > View Available Hint(s) ΑΣΦ 國] ? [U-238], = atoms
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