The half-life of cesium-137 is 30.2 y. How long will it take for a sample of cesium-137 to decay to 1/8 of its original mass?

Q: The half-life of strontium-90 is 28.0 years. How many grams of this nuclide in a 4.60-g sample will…

A: Half-life time t12=0.696k;   k is decay constantandt=1kln(m0m)m0 is mass of at time t=0m is mass of…

Q: Uranium-238, 238U, has a half-life of 4.51 x 109 years. How long will it take for 1.0 g of 238U to…

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Q: Plutonium-239 is a byproduct of the fission reaction used to produce energy in nuclear power…

A: Given data,Half life=24400yearstime=97600years

Q: Cesium-137 is part of the nuclear waste produced by uranium-235 fission. The half-life of cesium-137…

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Q: The half-life of radium-226 is 1.60X10³ yr. How manyhours will it take for a 2.50-g sample to decay…

A: Given :  t1/2 = 1.60 x 103 yr , [A0] = 2.50 g , [At] = 0.185 g Half-life : The time taken by any…

Q: Carbon-14 has a half life of 5730 years. How much carbon-14 would remain after 34380 years if the…

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Q: One of the nuclides in spent nuclear fuel is UU-235, an alpha emitter with a half-life of 703…

A: Given , half life of U-235 = 703 million years. We need to find the time at which the amount of…

Q: The half-life of Uranium-238 is approximately 4.5(10°) years. How much of a 10 kilogram block of U-…

A: Given data :- Half life = 4.5 x 109 years mass of uranium = 10 kg

Q: The half-life of a radioactive element is 1,250 years.What percent of the atoms remain after 5,000…

A: Number of half lives = 50001250 = 4 100%  →1250 years 50%  →1250 years 25% →1250 years 12.5 % →1250…

Q: The half-life of radioactive radium (226Ra) is 1599 years. What percent of a present amount of…

A: Chemical changes in which species amount varies linearly along with time basically obey"first-order…

Q: The half life of Carbon-14 is 5730 years. Calculate what percentage of C-14 will remain after 17,190…

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Q: A radioactive element has a half-life of 1.1 hours. How many hours will it take for the number of…

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Q: One of the nuclides in spent nuclear fuel is U-235, an alphaemitter with a half-life of 703 million…

A: The disintegration constant λ of a radioactive species is the fraction of the total no. of…

Q: Radioactive iodine (Iodine-131) has a half-life of 8.04 days. How long will it take for 150g of…

A: Given: The half-life of Iodine-131, t12 = 8.04 days. The initial amount of Iodine-131, (N0) = 150 g.…

Q: The half-life of carbon-14 is about 5715 years. A sample contains 1 gram of carbon-14. How much will…

A: Formula for half life,  N (t )= No(1/2)t/t1/2 where, N (t) = quantity of the substance remaining…

Q: Strontium-90 is one of the products of the fission of uranium-235. This strontium isotope is…

A: Given-> Half life (t1/2) = 28.1 year  Initial amount = 4.00 gm Final amount = 0.100 gm

Q: Cobalt-60 decays with a half-life of 5.27 years. What is the rate (in 1/yr) of decay?

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Q: Strontium-90 is one of the products of the fission of uranium-235. This strontium isotope is…

A: Given : Initial amount of strontium isotope = 1.00 g Final amount of strontium isotope = 0.200 g And…

Q: The half-life of cesium-137 is around 30 years, its rate of decay is proportional to the amount…

A: All decay reactions follow first order kinetics For first order reaction,   rate constant, k =…

Q: A rock contains 0.257 mg of lead-206 for every milligram of uranium-238. The half-life for the decay…

A: The first-order rate law can be transformed into another highly useful equation with the decay…

Q: .Strontium-90 is one of the products of the fission of uranium-235. This strontium isotope is…

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Q: The half-life of plutonium-239 is 24,110 years. If an original sample is 100. grams, how much…

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Q: NUCLEAR REACTIONS Zinc-62 decays with a half-life of 9.186 hours. 1. Write the balanced nuclear…

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Q: How many grams will be left after 100 days if you have 150 g of thorium-234 at the beginning?…

A: Given,  The mass in grams will be left after 100 days of the decay, if initial amount of Th-234 is…

Q: The half-life of radioactive chromium-51 is 28 days. If a sample of chromium-51 has a mass of 12.0…

A: Given, Half Life , t1/2 = 28 days First, calculate rate constant ,K to calculate time (t)

Q: If a rock sample was found to contain 4.65 x 10 mol of argon-40, how much potassium-40 would also…

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Q: The half-life of a radioactive isotope is 12.8 seconds. Starting with 0.960 g of this isotope, how…

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Q: The half-life of plutonium-239 is 24,100 years. How long will it take for a 100 g sample of…

A: Given,  Half life, t1/2 = 24100 years Initial amount = 100 g Reduced amount = 25 g Formula Used…

Q: The half-life of phosphorus-33 is 25 days. How much of a 128-g sample will remain after 150 days?

A: Let initial amount of P-33 present initially long year back = Ao = 128 g Final mount of P-33 present…

Q: Proton-85 has a half-life of 10 years. Approximately what percentage of Kr-85 produced from the…

A: Half life of Kr-85 = 10 yr % of Kr remain active = ?

Q: The half-life of radioactive chromium-51 is 28 days. If a sample of chromium-51 has a mass of 12.0…

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Q: How long long does it take for 78 % of sample of cobalt-60 to decay (the half life is 5,26 years)?

A: The rate of a reaction is expressed as: Rate = k[A]n where k is the rate constant, [A] is the…

Q: The radioactive substance neptunium -139 decays to 72.85% of its original amount after 28 hours. How…

A: For radioactive decay, relation between rate constant and its concentration is give below.…

Q: If a rock sample was found to contain 1.27 x 10-7 mol of argon-40, how much potassium-40 would also…

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Q: The isotope cesium-137 has a half-life of 29.75 years. How long will it take a 100 gram sample of…

A: Radioactive decay reactions are first order reactions. The calculation can be done using first order…

Q: The half-life of 90Sr is 29 years. What fraction of the atoms in a sample of 90Sr would remain 175…

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Q: The half-life of Oxygen-15 is 2 minutes. What fraction of a sample of O-15 will remain after 5 half…

A: Given,half-life = 2 minutesNeed to find out the fraction remaining after five half-lives.

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…

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Q: If 25%(1/4)of a radioactive element remains after1,000years, what is the half-life?

A: Radioactive elements are those elements whose nuclei are highly unstable and hence undergo…

Q: Strontium-90 is one of the products of the fission of uranium-235. This strontium isotope is…

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Q: An unknown sample contains radioactive element U-235, If the original amount present is 3500 atoms,…

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Q: Given the half-life of Carbon-14 is 5770 years, how much of a 540 gram sample is left after 10000…

A: For the given radioactive decay process: Rate constant, k =?  Half-life=5770 years According to…

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

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Q: A rock contains 0.257 mg of lead-206 for every milligram of uranium-238. The half-life for the decay…

A: The first-order rate law can be transformed into another highly useful equation with the decay…

Q: Radium has a half-life of 1600 years. How many years does it take for 90% of a given amount of…

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Q: Zinc-62 decays with a half-life of 9.186 hours. 1. Write the balanced nuclear reaction of Zn-62 as…

A: As per the rules, only three sub-parts can be answered:

Q: the half-life of aluminum 26 is .74 million years. Suppose an asteroid contained 800 kg of aluminum…

A: The half-life of aluminum 26 is 0.74 million years. The mass of aluminum 26 present in asteroid is…

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.