Homework Help is Here – Start Your Trial Now!
Science
Chemistry
Potassium 40 has a half-life of 1.28 × 10⁹ years. K-40 decays to only Ar-40 which is stable. No other radioactive element decays to produce Ar-40. A solid rock formed from molten magma. Recall gases have very low solubility of gases at high temperatures. So we assume that the initial amount of Ar-40 in the sample was zero. A sample of the rock has 0.145 milli moles of K-40, and 0.123 milli moles of Ar-40. How many years ago did this rock form?

Potassium 40 has a half-life of 1.28 × 10⁹ years. K-40 decays to only Ar-40 which is stable. No other radioactive element decays to produce Ar-40. A solid rock formed from molten magma. Recall gases have very low solubility of gases at high temperatures. So we assume that the initial amount of Ar-40 in the sample was zero. A sample of the rock has 0.145 milli moles of K-40, and 0.123 milli moles of Ar-40. How many years ago did this rock form?

Chemistry for Today: General, Organic, and Biochemistry
Chemistry for Today: General, Organic, and Biochemistry
9th Edition
ISBN:9781305960060
Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Publisher:Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Chapter10: Radioactivity And Nuclear Processes
Section: Chapter Questions
Problem 10.83E
See similar textbooks
icon
Related questions
Question

Nitesh

Potassium 40 has a half-life of 1.28 x 10⁹ years. K-40 decays to only Ar-40 which is stable. No other radioactive element decays to produce Ar-40. A solid rock formed from molten magma. Recall gases have very low solubility of gases at high temperatures. So we assume that the initial amount of Ar-40 in the sample was zero. A sample of the rock has 0.145 milli moles of K-40, and 0.123 milli moles of Ar-40. How many years ago did this rock form?
Transcribed Image Text:Potassium 40 has a half-life of 1.28 x 10⁹ years. K-40 decays to only Ar-40 which is stable. No other radioactive element decays to produce Ar-40. A solid rock formed from molten magma. Recall gases have very low solubility of gases at high temperatures. So we assume that the initial amount of Ar-40 in the sample was zero. A sample of the rock has 0.145 milli moles of K-40, and 0.123 milli moles of Ar-40. How many years ago did this rock form?
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 5 steps with 9 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Nuclear Reactions
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Chemistry for Today: General, Organic, and Bioche…
Chemistry for Today: General, Organic, and Bioche…
Chemistry
ISBN:
9781305960060
Author:
Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Publisher:
Cengage Learning
Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781337399074
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
Chemistry by OpenStax (2015-05-04)
Chemistry by OpenStax (2015-05-04)
Chemistry
ISBN:
9781938168390
Author:
Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:
OpenStax
Introductory Chemistry: A Foundation
Introductory Chemistry: A Foundation
Chemistry
ISBN:
9781337399425
Author:
Steven S. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Principles of Modern Chemistry
Principles of Modern Chemistry
Chemistry
ISBN:
9781305079113
Author:
David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:
Cengage Learning
Introductory Chemistry For Today
Introductory Chemistry For Today
Chemistry
ISBN:
9781285644561
Author:
Seager
Publisher:
Cengage
SEE MORE TEXTBOOKS