I need help with part b please Constants I Periodic TablePart AThe half-life for the radioactive decay of U – 238 is 4.5 billion years and isindependent of initial concentration.How long will it take for 16 % of the U – 238 atoms in a sample of U – 238 to decay?Express your answer using two significant figures.t = 1.1x10° yrSubmitPrevious AnswersCorrectCorrect answer is shown. Your answer 11.323-108 = 1.132x10° yr was either rounded differently or used a different number of significant figures than required for this part.Part BIf a sample of U – 238 initially contained 1.3x1018atoms and was formed 6.1 billion years ago, how many U – 238 atoms does it contain today?Express your answer using two significant figures.Templates Symbols undo redo reset keyboard shortcuts helpN =atoms

Answered: Image /qna-images/answer/d1592c4f-5073-47b4-8c0a-3b4a1c3e45c5.jpg

Constants I Periodic Tabl • Part A The half-life for the radioactive decay of U - 238 is 4.5 billion years and is independent of initial concentration. How long will it take for 16 % of the U - 238 atoms in a sample ofU - 238 to decay? Express your answer using two significant figures. t = 1.1x109 yr Submit Previous Answers v Correct Correct answer is shown. Your answer 11.323-10 = 1.132x10° yr was either rounded differently or used a different number of significant figures than required for this part • Part B If a sample of U – 238 initially contained 1.3x10o atoms and was formed 6.1 billion years ago, how many U - 238 atoms does it contain today? Express your answer using two significant figures. femplates Symbols uado redo reset keyboard shortcuts help, N = atoms

Constants I Periodic Tabl • Part A The half-life for the radioactive decay of U - 238 is 4.5 billion years and is independent of initial concentration. How long will it take for 16 % of the U - 238 atoms in a sample ofU - 238 to decay? Express your answer using two significant figures. t = 1.1x109 yr Submit Previous Answers v Correct Correct answer is shown. Your answer 11.323-10 = 1.132x10° yr was either rounded differently or used a different number of significant figures than required for this part • Part B If a sample of U – 238 initially contained 1.3x10o atoms and was formed 6.1 billion years ago, how many U - 238 atoms does it contain today? Express your answer using two significant figures. femplates Symbols uado redo reset keyboard shortcuts help, N = atoms

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Question

I need help with part b please

Constants I Periodic Table
Part A
The half-life for the radioactive decay of U – 238 is 4.5 billion years and is
independent of initial concentration.
How long will it take for 16 % of the U – 238 atoms in a sample of U – 238 to decay?
Express your answer using two significant figures.
t = 1.1x10° yr
Submit
Previous Answers
Correct
Correct answer is shown. Your answer 11.323-108 = 1.132x10° yr was either rounded differently or used a different number of significant figures than required for this part.
Part B
If a sample of U – 238 initially contained 1.3x10
18
atoms and was formed 6.1 billion years ago, how many U – 238 atoms does it contain today?
Express your answer using two significant figures.
Templates Symbols undo redo reset keyboard shortcuts help
N =
atoms

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