Homework Help is Here – Start Your Trial Now!
Science
Chemistry
1. The radioactive nuclide Co has a half-life of 5.27 years. Calculate the mass of Co that remains from a 0.0100 g sample of the nuclide after 1.00 year has elapsed. 60

1. The radioactive nuclide Co has a half-life of 5.27 years. Calculate the mass of Co that remains from a 0.0100 g sample of the nuclide after 1.00 year has elapsed. 60

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
Со 1. The radioactive nuclide Co has a half-life of 5.27 years. Calculate the mass of 60 27 60 27 Co that remains from a 0.0100 g sample of the nuclide after 1.00 year has elapsed. 35 161 2. The sample of S, is a B emitter, has an activity of 0.100 uCi. In 20.0 days, the activity of the sample has declined to 0.0853 uCi. What is the half-life ofS? 35 16 3. The half-life of 9Tc, a B emitter, is 15.8 s. (a) How many atoms of Tc are present in a sample with an activity of 0.200 i ? (b) What is the mass of the sample? 43 100 43 4. A sample of wooden artifact is found to undergo 9.0 C disintegrations per minute per gram of carbon. What is the approximate age of the artifact? The half-life of 1C is 5730 years, and the radiocarbon activity of wood recently cut down is 15 disintegrations per minute per gram of carbon. 14 5. Carbon-11, used in medical imaging, has a half-life of 20.4 min. The carbon-11 nuclides are formed and the carbon atoms are then incorporated into an appropriate compound. The resulting sample is injected into a patient and the medical image obtained. If the entire process takes five half-lives, what percentage of the carbon-11 remains at this time? 6. A rock contains 0.257 mg of lead-206 for every milligram of uranium-238. The half-life for the decay of uranium-238 to lead-206 is 4.5 x 10° years. How old is the rock? 7. If we start with 1.000 g of strontium-90, 0.953 g will remain after 2 years. (a) What is the half-life of strontium-90? (b) how much strontium-90 will remain after 5 years? (c) What is the initial activity of the sample in Bq?
Transcribed Image Text:Со 1. The radioactive nuclide Co has a half-life of 5.27 years. Calculate the mass of 60 27 60 27 Co that remains from a 0.0100 g sample of the nuclide after 1.00 year has elapsed. 35 161 2. The sample of S, is a B emitter, has an activity of 0.100 uCi. In 20.0 days, the activity of the sample has declined to 0.0853 uCi. What is the half-life ofS? 35 16 3. The half-life of 9Tc, a B emitter, is 15.8 s. (a) How many atoms of Tc are present in a sample with an activity of 0.200 i ? (b) What is the mass of the sample? 43 100 43 4. A sample of wooden artifact is found to undergo 9.0 C disintegrations per minute per gram of carbon. What is the approximate age of the artifact? The half-life of 1C is 5730 years, and the radiocarbon activity of wood recently cut down is 15 disintegrations per minute per gram of carbon. 14 5. Carbon-11, used in medical imaging, has a half-life of 20.4 min. The carbon-11 nuclides are formed and the carbon atoms are then incorporated into an appropriate compound. The resulting sample is injected into a patient and the medical image obtained. If the entire process takes five half-lives, what percentage of the carbon-11 remains at this time? 6. A rock contains 0.257 mg of lead-206 for every milligram of uranium-238. The half-life for the decay of uranium-238 to lead-206 is 4.5 x 10° years. How old is the rock? 7. If we start with 1.000 g of strontium-90, 0.953 g will remain after 2 years. (a) What is the half-life of strontium-90? (b) how much strontium-90 will remain after 5 years? (c) What is the initial activity of the sample in Bq?
Expert Solution
steps

Step by step

Solved in 2 steps with 1 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Dating Techniques
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
  • SEE MORE 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