The half-life of plutonium-241 is approximately 13 years.

a. How much of a sample weighing 44 g will remain after 90 years?

b. how much time is necessary for a sample weighing 44 g to decay to 0.1g?

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N=N0exp(-kt) 0.5 = exp(-13k) or ln(0.5) = -13k or =... View the full answer

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