# 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)?

🤓 Based on our data, we think this question is relevant for Professor Roychowdhury's class at RUTGERS.

###### 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

###### 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)?