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Chemistry: A Molecular Approach | 3rd Edition | ISBN: 9780321809247 | Authors: Nivaldo J. Tro
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The half-life of 235U, an alpha emitter, is 7.1 × 108 yr.

Chapter 19, Problem 96E

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QUESTION:

The half-life of 235U , an alpha emitter, is 7.1 x 108 yr. Calculate the number of alpha particles emitted by 1.0 mg of this nuclide in 1.0 minute.

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QUESTION:

The half-life of 235U , an alpha emitter, is 7.1 x 108 yr. Calculate the number of alpha particles emitted by 1.0 mg of this nuclide in 1.0 minute.

ANSWER:

Problem 96 EThe half-life of , an alpha emitter, is yr. Calculate the number of alphaparticles emitted by 1.0 mg of this nuclide in 1.0 minute. Step by step solutionStep 1 of 7The half life of an alpha emitter, is , the initial mass of is 1.0 mg.The radioactive decay follows the first order kinetics.So, the expression of half-life of first order process as follows:Here, is the number of radioactive nuclei at time, is the initial number of radioactivenuclei, k is rate constant, t is time.

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