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(10 points) What is the amount of radioactivity given off by a typical banana that contains 420 mg of Potassium, due to the presence of

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(10 points) What is the amount of radioactivity given off by a typical banana that contains 420 mg of Potassium, due to the presence of the natural isotope of 40 K? which has a half-life of 1.248 x 109 y and is 0.0117% of all Potassium. Atomic mass of K is 39.0983 g and A = 6.023 x 1023 atoms

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