The rate constant for a certain radioactive nuclide is 9.4 x 103h-1. What is the half-life of this nuclide? Half-life

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: How long will it take a radioactive sample of iodine-131 (half-life 8.07  d ) to lose 99.2  %  of…

A: The given disintegration reaction is first order reaction. Half life t1/2 = 0.693 / K 8.07 days =…

Q: How long does it take for a radioactive substance to decay from 360 cps to 11.25 cps if the…

A: Half-life is the time required for the reaction to be half completed. It is denoted by t1/2 . For a…

Q: on 5 A The nuclide As-76 has a half-life of 26.0 hours. If a sample of As-76 weighs 344 g, what mass…

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Q: While harder to access, another radioactive isotope of technetium, Tc-93, has a half-life of 2.73…

A: Solution Tc ninety nine m is wide used for diagnostic and therapeutic functions. It emits gamma…

Q: The rate constant for a certain radioactive nuclide is 9.8 x 10-3h-1 . What is the half-life of this…

A: The rate constant for radioactive nuclide is given as 9.8 x 10-3h-1. All the radioactive decays…

Q: A 76 mg sample of a radioactive nuclide is administered to a patient to obtain an image of her…

A: Given : Half life=12 hr Initial amount, [A]o=76 mg The final amount, [A]=? Time, t=3.5 days= 3.5 x…

Q: What is the half-life (t1/2) of a radioisotope if 1000 grams of the sample decays to 125 grams in…

A: The nuclear half-life is amount of time it takes for half of sample to decay radioactively.…

Q: Uranium-235 decays to Lead-207 with a half life of about 704 million. years. if you find a 1000g…

A: Half life of Uranium-235t12 = 704 million years Initial amount of fossilNo= 1000 gms Final amount of…

Q: 187 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 datas –  t1/2 = 30.2 years  t = ?  [A0] = 100.0 g  [At] = 1.20 g

Q: On irradiation of a radioactive element with neutrons, a radiochemist discovered a new nuclide…

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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…

A: The decay reactions are first order reactions. Hence for the first order reactions we can say that…

Q: The half life of an isotope is 43 seconds.how long does it take 100.00 g of isotope to decay to 6.25…

A: Given data contains, Half-life of an isotope is 43 seconds. Mass of isotope before decay is 100.0 g.…

Q: The half-life of Radium-226 is 1600 years. If 30 grams are left after 8,030 years, how many grams…

A: Radioactive decay follows first order kinetics.  k = 0.693/t0.5  Or, k = 0.693/1600 year^-1 =…

Q: 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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Q: 187 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: Half-life of Cs is 30.2 years. Intial amount sample = 100 g  Final amount sample = 1.00 g

Q: The nuclide 19O, prepared by neutron irradiation of 19F, has a half-life of 29 s.(a) How many 19O…

A: Radioactive decay follows first order kinetics.

Q: The half-life of a radioactive isotope is 13 seconds. How long does it take for 100 mg of the…

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Q: a rock conatains 0.257mg of Pb-206 for every milligram of U-238. The half-life for the decay of…

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Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 4.5 g remain. What is the original…

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Q: The half-life of the nuclide 211 At is 7.5 h. If 0.100 mg of this nuclide is administered for…

A: The answer to the following question is-

Q: The half life of an isotope is 43 seconds. How long does it take 100.0g of that isotope to decay to…

A: Half life = 43 second k = 0.693half life= 0.69343 sec=0.016 s-1

Q: 17. If it takes 12 half-lives for a radioactive chemical (k = 4.85 x 10-2 day¹) to decay to a level…

A: Half-life is the time taken for half of the radioactive atoms of a specific radionuclide to decay

Q: The half-life of tritium is 12.3 years. If 48.0 mg of tritium is released from a nuclear power plant…

A: Given data contains, Half-life of tritium is 12.3 years Mass of tritium is 48.0 g Time t is 5.0…

Q: A certain radioactive nuclide has a half life of 8.00 hour(s). Calculate the rate constant for this…

A: Radioactive disintegration follows first order kinetics  Decay constant (K) and half-life (t1/2)…

Q: A 40.0 mg sample of a radioactive substance decays to 10.0 mg in 10 days. What is the half-life of…

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Q: The half life for the decay of carbon-14 is 5.73 x 10 years. Suppose the activity due to the…

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Q: A certain radioisotope has a half-life of 6.58 days. What percentage of an initial sample of this…

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Q: Francium-223 is a radioactive isotope with a half-life of about 22 minutes. How much time will it…

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Q: The half-life of thorium-227 is 18.72 days. How many days are required for three-fourths of a given…

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Q: isotope with a half-life of about 22 minutes. How much time will it take for a sample of Fr-223 to…

A: Radioactivity follows first order kinetics,  Half life time (t1/2) = 22 minutes  k = 0.693/t1/2 =…

Q: The noble gas radon has been the focus of much attention because it may be found in homes. Radon-222…

A: Half life time = 3.82 days  Concentration decreases to 10% of original.  Let initial concentration =…

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

A: The relationship between the decay constant and the half-life period is given below.

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: A certain radioactive nuclide has a half life of 7.00 hour(s). Calculate the rate constant for this…

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

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…

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Q: what is the half life of an isotope that decays to 25% of its original activity in 68.9 hours?

A: For a first order reaction, rate constant can be calculated as

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 4.2 g remain. What is the original…

A:

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

A:

Q: A certain radioisotope has a half-life of 9.54 days. What percentage of an initial sample of this…

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

A: We have to find half -life of nuclide

Q: The half life for the decay of carbon-14 is 5.73 x 10° years. Suppose the activity due to the…

A:

Q: The isotope Np-238 has a half life of 2.0 days. If 96 grams of it were present on Monday, how much…

A: Here given, The half-life of Np-238 (t1/2)= 2 days. Initial amount present (N0) = 96 g Time (t) = 6…

Q: The activity of a particular radioactive nuclide falls from 1 × 1011 Bq to 2 × 1010 Bq in 10 hours.…

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Q: One of the nuclides in spent nuclear fuel is U−234U−234, an alpha emitter with a half-life of…

A: Welcome to bartleby !  We have to calculate time (years)

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.