Answered: Strontium-90 is a radioactive material…

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...

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Question

Strontium-90 is a radioactive material
that decays according to the function A1t2 = A0^e-0.0244t
,
where A0 is the initial amount present and A is the amount
present at time t (in years). Assume that a scientist has a
sample of 500 grams of strontium-90.
(a) What is the decay rate of strontium-90?
(b) How much strontium-90 is left after 10 years?
(c) When will 400 grams of strontium-90 be left?
(d) What is the half-life of strontium-90?

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