How long will it take 70 grams of cobalt-60 to decay to 17.5 grams

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: If you accidentally spill phosphorus-32 onto your shoe, how long would it take before 99.9% of the…

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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: Iodine-125 is a radioactive isotope commonly used in medicine. It has a half-life of 59.5 days. A…

A: Half life of iodine -125 = 59.5 daysInitial amount of iodine -125 = 2.00 kgFinal amount of iodine…

Q: a radioactive isotope of hydrogen, has a half-life of 12.4 years. Of an initial sample of 33 grams,…

A: Reaction in which rate is linearly depend upon one reactant is known as first order reaction.

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: The number of radioactive nuclides in a sample decays from 3.80 x to 1020 19 9.50 x 10 in 58.0…

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Q: Seaborgium-266 has a half-life of 30 seconds. How many half-lives will pass in 30 minutes?

A: Given values -> Half life = 30seconds Total time = 30 minutes

Q: Iodine-131 has a half life of 2.2 × 10-2 year. How long will it take to reduce a 133 g sample of…

A: Half Life = t1/2 = 2.2 * 10-2 yeark t1/2 = ln (2)k * 2.2 * 10-2 year = 0.693k = 31.5 year-1

Q: If the amount of radioactive phosphous-32 in a sample decreases from 1.2 g to 0.30 g in 28.6 days,…

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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: the half life of iodine-131 is 8 days, after how many days will a sample of it decay to 70% of its…

A: As we know,  Radioactive decay follows 1st order kinetics.Integrated rate law equation for 1st order…

Q: The half-life of Radium-226 is 1600 years. A sample has 100 mol remaining after decaying for 64…

A: Given, Remaining moles of Radium-226 after decay = 100 mol Half life of Radium-226 = 1600 years.…

Q: 6. A rock contains 0.257 mg of lead-206 for every milligram of uranium-238. The half-life for the…

A: Given, Half-life - 4.5 × 109 yr. 1 mg U-238 contains 0.257 mg of Pb-206.

Q: A hepatobiliary scan is a common technique used to assess the functionality of a patient's…

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Q: Hydrogen-3 has a half-life of 12.3 years. How many years will it take for 890.0 mg 'H to decay to…

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Q: PET scans require fluorine-18, which is produced in a cyclotron and decays with a half-life of 1.83…

A: Given: Half life, T1/2 = 1.83 hrVelocity of transport, v= 60.0 miles/hrfinal Concentration of F-18 =…

Q: The half-life of sodium-24 is 15 hr. If a sample initially contains 40. g of sodium-24, how much…

A: Radioactive reactions are First order reactions. Half life of Sodium-24 is 15 hr. Initial…

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: 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: What is the half-life of polonium-210 if it takes 828 days for a 100.0 g sample to be reduced to 1.6…

A: Polonium-210 is a radioactive element so it's decay is followed first order kinetics.

Q: Radium-221 has a half life of 30 seconds. How long will it take for 82% of a sample to decay?

A: Half life =30 seconds Decay percentage = 80%

Q: Calcium-45 has a half-life of 162.61 days. If 4 mg of this isotope remains after 300 days, what is…

A: Radioactive decay follows first-order kinetics. The half-life of the first-order reaction does not…

Q: 4. How long will it take for a sample of iron-55 to decay to 1/64 of its original mass if iron- has…

A: Radioactive decays are always first order reaction. So we will use rate law equation of first order…

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: 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: Strontium-90, a beta emitter, has a half-life of 28.1 yr. If 38.9 mg of ⁹0Sr were incorporated into…

A: The first step in solving this problem is to determine the decay constant, which is given by the…

Q: The half-life of nitrogen-16 is 7.0 seconds. How long does it take for 100 mg of nitrogen-16 to be…

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Q: Radioactive Radon-222 gas (222Rn) occurs naturally as a product of uranium decay. The half-life of…

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Q: The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 2.000-mg sample remains after 9.50…

A: First of all let's see the given data in the question, Half-life of cobalt-60 ( t1/2 ) = 5.20 years…

Q: The half life of Plutonium-239 (239Pu, Pu-239) is 24,100 years. How much plutonium will remain after…

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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: 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: what is the half-life of plutonium-239 if it takes 14 098 years for 33% of a given sample to decay

A: Radioactive decay follows the first-order kinetics. According to the first-order kinetics, the decay…

Q: The half life of Fr is 19 minutes. How many minutes will it take for a given amount of this…

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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.…

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.