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 0.500 g? years

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: A 16.0 g sample of technicium-99m has a half-life of 6.0 hours. How much sample remains 24 hours…

A: As per the given information in the question, First calculate the rate constant (K) of the…

Q: Uranium-235 has a half-life of 7.04 x 108 years. How many years will it take for 99.9% of a U-235…

A: Given,

Q: The half-life of Phosphorus-32 is 14.3 days. If you start with 100 grams of it, how long will it…

A: Half life of a first order reaction is given by , t1/2=0.693k Write the expression for first order…

Q: The half-life of strontium-90 is 28 years. H

A: Given t1/2 of a reaction is 28 years  decay constant  (λ) λ = 0.693t1/2     = 0.69328 y     =…

Q: Sodium-24, which is used to locate blood clots in the human circulatory system, has a half-life of…

A: Half life period: The time required to decay half of the initial amount is known as half life…

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: Cobalt-60 has a half-life of 5.27 years and is used in cancer treatment. If a patient ingests 20.0 g…

A: Since the decay reactions are first order reactions hence the relationship between the time and mass…

Q: Tellurium-123 is a radioactive isotope occurring in natural tellurium. The decay constant is 1.7 x…

A: Radioactivity is a special property of some elements or substances by which they continuously…

Q: Thorium, a rare element in the earth's crust, has over seven radioactive isotopes. Of of these Th…

A: The rate of the reaction is referred to the change in the molar concentration in the distinct…

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 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 129I is 1.72 x 107 years. Consider a sample that contains 2.39 x 106 atoms of this…

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Q: Radioactive nuclide, 90Sr, has a half-life of 30 years. What percent of a sample of 90Sr will remain…

A: Half life = 30 years  Time given = 60 years

Q: The half-life of mercury-203 is 46.6 days. What percentage of mercury-203 remains in a sample after…

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Q: 11. The half-life of a newly discovered element, Jimmium, is 55 minutes. How long will it take a…

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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: 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: 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: 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 would it take for the amount of u-235 to reach 1/8 of its initial amount? One of the…

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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: A sample of a newly discovered element, West Virginium, has a half-life of 288 years.  How long…

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

A:

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

A: First-order reaction: The type of reaction which depends only on one substance is called a…

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: A radioactive sample initially contains 2.40×10^−2 mol of a radioactive material whose half-life is…

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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 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: The​ half-life of​ silicon-32 is 710 years. If 20 grams is present​ now, how much will be present…

A: Radioactive decay is always a first order reaction. The rate equation for the radioactive decay is :…

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: Iron‑59 is used to study iron metabolism in the spleen. Its half‑life is 44 days.44 days. How many…

A: The time will take a 28.0 g28.0 g sample of iron‑59 to decay to 1.75 g has to be calculated

Q: Barium -122 has a half-life of 2 minutes.  Suppose you obtain a sample weighing 10.0g and it takes…

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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…

A:

Q: 3. 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:

Q: How many hours are needed for a 16.0 g sample of Si-31 to decay to 2.0 g? The half-life for Si-31 is…

A: Solution -

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…

A:

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: 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: Americium-241 is widely used in smoke detectors. The radiation released by this element ionizes…

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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…

Q: Cobalt-60, which undergoes beta decay, has a half-life of 5.26 yr. (a) How many beta particles are…

A: Given: Half life of beta decay= 5.26 year Time= 600s Mass of Cobalt-60= 3.75 mg

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.