50. Selenium-82 undergoes double beta decay: Se - Kr + 2 je¯ + 27 This low-probability process occurs with a half-life of 3.5 x 1027 s, one of the longest half-lives ever measured. Estimate the activity in an 82.0-g (1.00 mol) sample of this isotope. How many 82Se nuclei decay in a day?

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A: Given that  Initially weight of isotope sample = 100.0 gm initially number of atoms of isotope No=…

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A: Activity of 40 K = 105 beta rays. The decay constant λ can be calculated as follows:

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A:

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A:

Q: The half-life of radium-226 is 1.60 × 10' yr. How many hours will it take for a 2.50-g sample to…

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A:

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Q: A sample of uranium ore contains 5.37 mg of U-238 and 2.52 mg of Pb-206. (a) Calculate the…

A: Given mass of U-238 = 0.00537 g Number of moles of U-238 = 0.00537/238 = 2.26 × 10-5 mol Given mass…

Q: Cobalt-60 is a beta emitter with a half-life of 5.3 years. Approximately what fraction of cobalt-60…

A: The half life of cobalt-60 is = 5.3 year The fraction of cobalt-60 atoms will remain in a particular…

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A: Given : Half life of 90Y = 2.67 days. And mass of 90Y remaining after 1.03 days = 4.02 µg

Q: After 42 years, what mass remains of a 200.0 g sample of a radioactive isotope with a half-life of…

A:

Q: 137 Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A: Given half life = 30.2 years initial Concentration = 100 g Concentration at time t = 0.900 g

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A:

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A:

Q: 2. A radioactive sample contains 9.5 x 1017 atoms of a nuclide that decays at a rate of 5.4 x 1013…

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A:

Q: #5 A rock contains 0.257 mg of Pb-206 for every milligram of U-238.The half-life for the decay of…

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A: Answer is as follows

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A:

Q: Iodine-125 (¹251) is used to treat, among other things, brain tumors and prostate cancer. It decays…

A:

Q: The half-life of Ga-67 is 77.9 hours. How long will it take Ga-67 to decay and lose 95% of its…

A:

Q: 137 Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A:

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A: Chemical kinetics is branch of chemistry that deals with rates of chemical reactions.

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A:

Q: Phosphorus-30, which has a half-life of 150 seconds, decays by positron emission. How long will it…

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A:

Q: ubidium-87 decays by B production to strontium-87 with a half life of 4.7 x 1010 years. What is the…

A:

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A:

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A: Answer - The correct option is (A) 5.2 x 104 Ci

Q: Selenium-82 undergoes double beta decay: 82 Se 34 → Kr + 2 je + 27 This low-probability process…

A: t12=3.5×1027sA=λNλ=ln2t12=0.693.5×1027=0.19×10-27s-1to calculate no. of atomno. of…

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.