Plutonium-239 is a radioactive waste from nuclear reactors and has a half-life of 25,000 years. How many years must a 100g sample of Pu-239 be stored until only 0.049g of the Pu-239 remains?   a. 2.5 x 104 years b. 1.9 x 105 years c. 2.8 x 105 years d. 5.6 x 106 years e. no correct response is given

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Q: Anwita is on a geology feild trip and finds a rock that contains 38% of the original potassium-40,…

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A: Given,  Time = t = 8 8 minutes Half-life period = t1/2 = 2 minutes Percentage of the original…

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Q: I-131 has a half-life of 8.04 days. If a sample initially contains 20.0 g of I-131, approximately…

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Q: 43. C-14 has a half-life of 5730 years. How many grams of a 4.00 g sample would be left after 3.5…

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Q: c) What percentage of the isotope will remain after 115 days lfur 25. alpha beta and

A:

Q: QUESTION 7 A radioactive isotope, Z-109, has a half-life of 62.3 years. How many years (y) will it…

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Q: Naturally occurring uranium is composed mostly of 238U and 235U, with relative abundances of 99.28%…

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A:

Q: The half-life of strontium-90 is approximately 29 years. How much of a 500 g sample of strontium-90…

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Q: how much will remain after 12.0 days?

A:

Q: A freshly isolated sample of "Y was found to have an activity of 7.3 x 10° disintegrations per…

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Q: The half life for the radioactive decay of rubidium-87 to strontium-87 is 4.88 × 10" years. Suppose…

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Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.