Question: 3. (5 pts) While Uranium-238 undergoes a 1st order decay with a half-life of close to 4.5 billion years, when it absorbs a neutron to

3. (5 pts) While Uranium-238 undergoes a 1st order decay with a half-life of close to 4.5 billion years, when it absorbs a neutron to become 239U, the 1nt order decay has a half-life of 23.5 minutes only, eventually decaying to 239Pu. How many grams would be left of a 18kg sample of U-239 after 7 hours

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