The half life for the radioactive decay of potassium-40 to argon-40 is 1.26×10⁹ years. Suppose nuclear chemical analysis shows that there is 0.723 mmol of argon-40 for every 1.000 mmol of potassium-40 in a certain sample of rock. Calculate the age of the rock. Round your answer to 2 significant digits. years 0x1.0

The half life for the radioactive decay of potassium-40 to argon-40 is 1.26×10⁹ years. Suppose nuclear chemical analysis shows that there is 0.723 mmol of argon-40 for every 1.000 mmol of potassium-40 in a certain sample of rock. Calculate the age of the rock. Round your answer to 2 significant digits. years 0x1.0

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

Similar questions

The half life for the decay of carbon-14 is 5.73 × 10³ years. Suppose the activity due to the radioactive decay of the carbon-14 in a tiny sample of an artifact made of wood from an archeological dig is measured to be 60. Bq. The activity in a similar-sized sample of fresh wood is measured to be 66. Bq. Calculate the age of the artifact. Round your answer to 2 significant digits. years D-P
A certain drug has a half-life in the body of 5.5 h. What should the interval between doses be, if the concentration of drug in the body should not fall below 35.% of its initial concentration? Round your answer to 2 significant digits.
. Let's apply the results of Problem 2 to potassium-argon dating frequently used to date sedimentary rocks. Potassium-40 decays by two different paths: electron emission electron capture where conversion to Ca occurs 89.1% of the time, and to Ar 10.9% of the time. The overall half-life for the decay of potassium-40 is 1.248 × 10⁹ years. Estimate the age of sedimentary rocks with an argon-40 to potassium-40 ratio of 1.02 %. 40 19K 140 Ca 40K 240 Ar 19 18-
Round your answer to 2 significant digits please!
Oxygen-22 disintegrates into Fluorine with a decay rate of λ = 0.315 per seconds. Considering an initial amount of Oxygen 22, which percentage of it will be left after 5.8 seconds? Keep three significant digits.
The natural radioisotope, radium-226 (226Rn), undergoes a radioactive decay where it emits an alpha particle to become radon-222 (222Rn) which has a half-life of 3.82 days. Will a sample of 222Rn be at less than one fifth (1/5) of its original strength after a period of 5 days? Explain.
The half-life of radioactive strontium-90 is 28.8 years. How long would it take when only 16.5% of the original strontium-90 sample remains?
A certain drug has a half-life in the body of 7.5 h. What should the interval betwe 60.% of its initial concentration? Round your answer to 2 significant digits.