An isotope of the element erbium has a half-life of approximately 12 hours. Initially there are 30.1 grams of the isotope present. What is the rate of decay at t = 8.6 hours?
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An isotope of the element erbium has a half-life of approximately 12 hours. Initially there are 30.1 grams of the isotope present. What is the rate of decay at t = 8.6 hours?
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