The half-life for the radioactive decay of U-238 is 4.5 billion years and is independent of initial concentration. Part A How long will it take for 10% of the U-238 atoms in a sample of U-238 to decay? Express your answer using two significant figures. 190 ΑΣΦ Α 0.638 Submit Part B Previous Answers Request Answer * Incorrect; Try Again; 4 attempts remaining ? 16] ΑΣΦ N- 1.88 10° If a sample of U-238 initially contained 1.4x10¹8 atoms when the universe was formed 13.8 billion years many U-238 atoms will it contain today? Express your answer using two significant figures. Submit Previous Answers Request Answer ут X Incorrect; Try Again: 3 attempts remaining atoms
The half-life for the radioactive decay of U-238 is 4.5 billion years and is independent of initial concentration. Part A How long will it take for 10% of the U-238 atoms in a sample of U-238 to decay? Express your answer using two significant figures. 190 ΑΣΦ Α 0.638 Submit Part B Previous Answers Request Answer * Incorrect; Try Again; 4 attempts remaining ? 16] ΑΣΦ N- 1.88 10° If a sample of U-238 initially contained 1.4x10¹8 atoms when the universe was formed 13.8 billion years many U-238 atoms will it contain today? Express your answer using two significant figures. Submit Previous Answers Request Answer ут X Incorrect; Try Again: 3 attempts remaining atoms
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter18: Nuclear Chemistry
Section: Chapter Questions
Problem 18.ACP
Related questions
Question
![The half-life for the radioactive decay of U-238
is 4.5 billion years and is independent of initial
concentration.
D
Part A
How long will it take for 10% of the U-238 atoms in a sample of U-238 to decay?
Express your answer using two significant figures.
195] ΑΣΦ
t = 0.638
Submit Previous Answers Request Answer
* Incorrect; Try Again; 4 attempts remaining
Part B
?
196] ΑΣΦΑ
N = 1.88. 10°
If a sample of U-238 initially contained 1.4x108 atoms when the universe was formed 13,8 billion years a
many U-238 atoms will it contain today?
Express your answer using two significant figures.
Submit Previous Answers Request Answer
?
5.
X Incorrect; Try Again; 3 attempts remaining
atoms.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F59e95eea-2f09-4222-bb70-2025acff742b%2Fb657c531-f454-4eff-bfd6-c7a299912847%2Fq5l25bj_processed.jpeg&w=3840&q=75)
Transcribed Image Text:The half-life for the radioactive decay of U-238
is 4.5 billion years and is independent of initial
concentration.
D
Part A
How long will it take for 10% of the U-238 atoms in a sample of U-238 to decay?
Express your answer using two significant figures.
195] ΑΣΦ
t = 0.638
Submit Previous Answers Request Answer
* Incorrect; Try Again; 4 attempts remaining
Part B
?
196] ΑΣΦΑ
N = 1.88. 10°
If a sample of U-238 initially contained 1.4x108 atoms when the universe was formed 13,8 billion years a
many U-238 atoms will it contain today?
Express your answer using two significant figures.
Submit Previous Answers Request Answer
?
5.
X Incorrect; Try Again; 3 attempts remaining
atoms.
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