Homework Help is Here – Start Your Trial Now!
Science
Chemistry
A 0.500 g sample of rock was found to have 2.45 × 10-6 mol of potassium-40 (t1/2 = 1.3 × 109 yr) and 2.45 × 10-6 mol of argon-40. How old was the rock?

A 0.500 g sample of rock was found to have 2.45 × 10-6 mol of potassium-40 (t1/2 = 1.3 × 109 yr) and 2.45 × 10-6 mol of argon-40. How old was the rock?

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...
See similar textbooks
icon
Related questions
Question

A 0.500 g sample of rock was found to have 2.45 × 10-6 mol of potassium-40 (t1/2 = 1.3 × 109 yr) and 2.45 × 10-6 mol of argon-40.

How old was the rock?

A 0.500 g sample of rock was found to have 2.45 x 1o-6 mol of potassium-40 (t1/2 = 1.3 x 10° yr) and 2.45 x 10-6 mol of argon-40. Part 1 Your answer is correct. What assumption should be made about the origin of the argon-40 if we want to determine the age of the rock? It must be assumed that all of the argon-40 that is found in the rock must have come from the potassium-40. It must be assumed that the amount of the argon-40 and the amount of the potassium-40 are equal. It must be assumed that the amount of argon-40 will increase with decreasing amount of potassium-40. It must be assumed that all of the potassium-40 that is found in the rock must have come from the argon-40. eTextbook and Media Attempts: 4 of 15 used Part 2 How old was the rock? years old
Transcribed Image Text:A 0.500 g sample of rock was found to have 2.45 x 1o-6 mol of potassium-40 (t1/2 = 1.3 x 10° yr) and 2.45 x 10-6 mol of argon-40. Part 1 Your answer is correct. What assumption should be made about the origin of the argon-40 if we want to determine the age of the rock? It must be assumed that all of the argon-40 that is found in the rock must have come from the potassium-40. It must be assumed that the amount of the argon-40 and the amount of the potassium-40 are equal. It must be assumed that the amount of argon-40 will increase with decreasing amount of potassium-40. It must be assumed that all of the potassium-40 that is found in the rock must have come from the argon-40. eTextbook and Media Attempts: 4 of 15 used Part 2 How old was the rock? years old
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Discovery of Radioactivity
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.
Similar questions
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
SEE MORE TEXTBOOKS