How long will it take before twenty percent of our 1,000-gram sample of uranium-235 has decayed? [See Section 6.6 Example 13] Which is this: A(t) = A0 (1 / 2)t/T where • A0 is the amount initially present • T is the half-life of the substance • t is the time period over which the substance is studied • y is the amount of the substance present after time t The decay equation is A0 eKt , where t is the time for the decay, and K is the characteristic of the material. Suppose T is the time it takes for half of the unstable material in a sample of a radioactive substance to decay, called its half-life. Prove that K = ln0.5 / T . What is K for the uranium-235?
How long will it take before twenty percent of our 1,000-gram sample of uranium-235 has decayed? [See Section 6.6 Example 13] Which is this: A(t) = A0 (1 / 2)t/T where • A0 is the amount initially present • T is the half-life of the substance • t is the time period over which the substance is studied • y is the amount of the substance present after time t The decay equation is A0 eKt , where t is the time for the decay, and K is the characteristic of the material. Suppose T is the time it takes for half of the unstable material in a sample of a radioactive substance to decay, called its half-life. Prove that K = ln0.5 / T . What is K for the uranium-235?
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter25: Nuclear Chemistry
Section: Chapter Questions
Problem 67IL
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How long will it take before twenty percent of our 1,000-gram sample of uranium-235 has decayed? [See Section 6.6 Example 13] Which is this: A(t) = A0 (1 / 2)t/T
where
• A0 is the amount initially present
• T is the half-life of the substance
• t is the time period over which the substance is studied
• y is the amount of the substance present after time t
The decay equation is A0 eKt , where t is the time for the decay, and K is the characteristic of the material. Suppose T is the time it takes for half of the unstable material in a sample of a radioactive substance to decay, called its half-life. Prove that K = ln0.5 / T . What is K for the uranium-235? Show the steps of your reasoning.
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