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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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. A certain radioactive nuclide has a half-life of 80.9 years. How long does it take for 87.5% of a sample of this substance to decay?

Interpretation Introduction

Interpretation:

Interpret the time it takes by the sample with half life 80.9 yrs to reduce by 87.5 %.

Concept Introduction:

The mass of isotope remaining after specified time can be identified through the below formula:

 (N /N0) = (1 /2)t /t half

N is number of mole left after time t

N0 is initial number of mole

Th a l f is half life.

Explanation

The mass of isotope remaining after specified time can be identified through the below formula:

(12.5 /100) = (1 /2 )t /80

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