# Problem: The bromine-82 nucleus has a half-life of 1.0 X 10 3 min. If you wanted 1.0 g  82Br and the delivery time was 3.0 days, what mass of NaBr should you order (assuming all of the Br in the NaBr was 82Br)?

###### FREE Expert Solution

Recall that half-life is the time needed for the amount of a reactant to decrease by 50% or one-half

The half-life of a first-order reaction is given by:

$\overline{){{\mathbf{t}}}_{\mathbf{1}}{\mathbf{2}}}{\mathbf{=}}\frac{\mathbf{ln}\mathbf{2}}{\mathbf{k}}}$

where:

t1/2 = half-life

k = decay constant

90% (178 ratings) ###### Problem Details

The bromine-82 nucleus has a half-life of 1.0 X 10 3 min. If you wanted 1.0 g  82Br and the delivery time was 3.0 days, what mass of NaBr should you order (assuming all of the Br in the NaBr was 82Br)?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the First Order Half Life concept. You can view video lessons to learn First Order Half Life. Or if you need more First Order Half Life practice, you can also practice First Order Half Life practice problems.

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Based on our data, we think this problem is relevant for Professor Maxwell's class at UCF.

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Our data indicates that this problem or a close variation was asked in Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition. You can also practice Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition practice problems.