How many half lives will it take for 50 g of "Tc to decay to 6.25 g?

Q: The half-life of 26?? 59 is 44.6 days. How long will it take for 95.0% of a sample of this nuclide…

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Q: = 176.5 h) to decay. Use the Calculate the time required for 46.80 % of a sample of X (t, formula…

A: Given : Half life i.e t1/2 of reactant (radioactive isotope) = 176.5 hr. And percent of reactant…

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: Given  Half life of Ga- 67 = 77.9 hours  decay % = 95 %  Time ( t ) = ?

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

A: Half life = 28.1 year Initial amount = 1.50 gm Final amount = 0.100 gm

Q: The half life of 15O is 122 seconds. If you start with a sample of 400g how long will it take to end…

A: Radioactive decay follows first-order kinetics. Hence, the integrated rate law for the radioactive…

Q: How much time is required for a 6.25-mg sample of 51Cr to decay to 0.75 mg if it has a half-life of…

A: The initial amount of the sample = 6.25 mg The amount of sample after time t = 0.75 mg. The…

Q: Determine the half life of an isotope hat decays from 450.0g to 320.0g in 50 years.

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Q: The isotope 208Tl undergoes β decay with a half-life of 3.1 min.(a) What isotope is produced by the…

A: isotope is produced by the decay has to be determined The time taken for 99.0% of a sample of pure…

Q: 7. If we start with 1.000 g of strontium-90, 0.953 g will remain after 2 years. (a) What is the…

A: Reladioactive decay reactions are first order reactions which can be solved as follows using…

Q: What is the half life of a radioactive sample , if 3/4 of its nuclei decay in 2 years ?

A: Given:The amount of nuclear decay in 2 years = ¾ th of initial massAssume that the initial mass =…

Q: The half-life of potassium K-42 is 14.5 hours. (a) how much of 11g sample is remaining after 5…

A: During radioactive decay, the decaying speed shows linear relation with initial mass of atom. This…

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: 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

Q: The half-life of cesium-137 is 30 years. Suppose we have a100-mg sample.(a) Find the mass that…

A: (a) Given half life of cesium- 137 = 30 years. For calculating mass after t years, Formula for…

Q: How long will it take for 50% of a sample of ³'I to decay?

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Q: 1a) How long will it take for 30 g of 222Rn to decay to 7.5 g? 1b) How many grams of 1°N will be…

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Q: The half life of 21 At is 7.214 hours. What fraction of a sample of21At will remain after 3.141…

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Q: Ten grams of the plutonium isotope 239Pu were released in a nuclear accident. How long will it take…

A: Step : 1               How long will it take for the 10 grams to decay to 1 gram?

Q: An unknown radioactive element decays into non-radioactive substances.  In 660 days the…

A: Rate constant (k)= 2.303/t log 100/49 So k = (2.303/660) ×0.3098 =0.0011 days ^-1

Q: The isotope 100 Tc has a half life of 16 sec, what is the radioactive decay constant, k?

A: Given: Half life of isotope 100Tc = 16sec As all radioactive process are first order reactions using…

Q: The half-life of 51Cr is 2.78×101 day. Calculate how much time it would take for an isolated…

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Q: The half-life of 90Sr is 28.8 years. How long will it take (in years) for a 86.1 mg sample of 20Sr…

A: Given t= 28.8 years. t1/2 = ?

Q: Radon-222, 222/86 Rn, has a half-life of 3.823 days. How long will it take a sample of radon-222…

A: we know, the rate constant isK=λ=ln2t1/2=0.69313.823 dK=0.1813 d-1

Q: Radium-221 has a half of 30 sec. How long will it take for 82% of a sample to decay?(Round your…

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Q: How long does it take for 105 mg of tritium H to decay to 35.0 mg? The half-life of tritium is 12.3…

A: All radioactive decays are first order reaction.

Q: The half-life of iron-59 is 44.5 days. How much of a 3.00-mg sample will remain after 222.5 days?

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Q: It takes 870.98 years for carbon-14 to decay to 90 mg. What is the half life of carbon-14?

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Q: Radium 223 decays with a 1/2 life of 11.4 days. How one will it take for 0.240 mol sample of radium…

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Q: How long does it take for a sample of 27?? 60 to disintegrate to the extent that only 2.0% of the…

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Q: The half life of 123I is 13 hr.  How much of a 64 mg sample of 123I is left after 26 hours?

A: Given,Half life of 123I is 13 hr

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:

Q: How long will it take for 500 g of ºSr to decay to 125 g?

A: Given details, 500 g of 90Sr decay to 125 g. To calculate the time t.

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: 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 means time takwen by the sample to reachhalf of its concentartion.  Remains afetr t time =…

Q: The half-life of cobalt-60 is 5.3 years. How long will it take for a 1.000-mg sample of cobalt-60 to…

A: Given: The half-life of Co-60 is 5.3 years. The initial amount of Co-60 is 1.000 mg. The amount of…

Q: The isotope 208Tl undergoes β decay with a half-life of 3.1 min.  How many minutes will it take for…

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Q: c. What mass of Cs will be left in a 24.0 g sample of Cs after 90 years? d. What fraction of Cs-137…

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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: ²⁷Al is the only stable isotope of aluminum. Predict how ²⁴Al and ³⁰Al will decay. A) β⁻ decay…

A: A)

Q: What is the half-live of a radioactive isotope if it takes 6.2 days for a 72g sample to decay to…

A: Given, 72 g to decay to 18 g. t = 6.2 days To calculate the half-life.

Q: The half-life of 199Tc, a ߯ emitter, is 15.8 s. (a) How many atoms of 199Tc are present in a sample…

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Q: How many 14C atoms are in a charcoal sample that has a decay rate of 3,500 disintegrations per min?…

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Q: How long does it take for 87.5% of each isotope to decay? Kr-91 Kr-89 min Kr-79 h Kr-81 yr

A: A radioactive isotope's half-life is the time taken for one-half of the isotope to decay. A…

Q: The half-life of Po-214 is 0.001 seconds. How much of a 10 gram sample is left after 0.003 seconds?…

A: We know radioactive decay follows first order reaction kinetics, therefore  t1/2=0.001 s and…

Q: What is the half life of a radioactive sample, if3/4of its nuclei decay in 2 years?

A: The amount of nuclear decay in 2 years = ¾ th of initial massAssume that the initial mass = 1The…

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

A: Since you have posted multiple independent questions in the same request, we will solve the first…

Q: The isotope 261-Lr decays by a emission with a half-life of 2.7 min. How many minutes will it take…

A: As we know the Decay equation: λ=1tlnaoa a0= Initial concentration a= Concentration left after time…

Q: How long does it take a 30.0 mCimCi sample of gold-198 to decay so that only 7.50 mCimCi remains?

A: Given datas ;  [A0] = 30.0 mCi  [At] = 7.50 mCi  t = ?  Since, we know that ; The half life of…

Q: If 600,0g of 14C decays after 3 half lifes, how much of the sample would remain ( in grams)?

A: Recall the following relation to calculate amount of radioactive sample remain after a definite time…

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.