🤓 Based on our data, we think this question is relevant for Professor Funck's class at JMU.
We’re being asked to determine the time it takes for 10.3 ppm of Strontium-90 to decrease to 1.0 ppm.
Recall that radioactive/nuclear decay of isotopes follows first-order kinetics, and the integrated rate law for first-order reactions is:
[N]t = concentration at time t
k = decay constant
t = time
[N]0 = initial concentration.
The half-life for beta decay of strontium-90 is 28.8 years. A milk sample is found to contain 10.3 ppm strontium-90. How many years would pass before the strontium-90 concentration would drop to 1.0 ppm?
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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 Funck's class at JMU.