A sample of sodium-24 with an activity of 12 mCi is used

Chapter 4, Problem 32QP

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QUESTION:

A sample of sodium-24 with an activity of 12 mCi is used to study the rate of blood flow in the circulatory system. If sodium-24 has a half-life of 15 h, what is the activity of the sodium after 2.5 days?

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QUESTION:

A sample of sodium-24 with an activity of 12 mCi is used to study the rate of blood flow in the circulatory system. If sodium-24 has a half-life of 15 h, what is the activity of the sodium after 2.5 days?

ANSWER:

Solution 32 QPHere, we have to find the activity of sodium after 2.5 days.Solution 1 of 2GivenActivity of sodium - 24 sample - 12 mCiHalf -life o sodium - 15 hrs.Equality and conversion factors of hours is as follows.1 half life = 15hrsSo, the conversion factors are and 2.5 days are equal to the 60 hrs.Let’s find the number of half -lives during 60 hrs60 hrs = 4 half - lives.________________________________________________________________________

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