Cobalt-60 is commonly used as a source of beta-particles. How long does it take for 87.5 perxent of a sample cobalt-60 to dacay (half-life= 5.26 yr)?

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: Bandages can be sterilized by exposure to gamma radiation from cobalt-60, which has ahalf-life of…

A: Given: The mass of the sample is 5.27 Y. The half-life of cobalt-60 is 5.27 y.

Q: Cobalt-60, which undergoes beta decay, has a half-life of 5.26 yr.    If you start with 2.44 g of…

A: Interpretation: The amount of beta particles are emitted in 125 days is to be calculated from the…

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

A:

Q: Iodine-131 has a half-life of 8.0 days. How long will it take 10 µg of 131I to decrease to 1/100 of…

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Q: The half-lives of different radioisotopes are given in the table. Radioisotope Half-life (min)…

A: We know that,→ Radioactivity Phenomena follow first oroen kinetics.So, Rate = KA1 K → Rate…

Q: Co-60 is used extensively in radiotherapy as a source of y-rays. Its half life is 5.27years. a) How…

A: half life = 5.27 years

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

A:

Q: What is the original mass of C-14 in a sample if 10.00 mg of it remains after 20,000 years? The…

A: The C-14 decays according to first order kinetics. Since we know that the relationship between the…

Q: A substance has a half-life of 2.045 minutes. If the  initial amount of the substance was 132.8…

A: Given,  Half-life, t1/2  = 2.045 minutes Initial ammount, A0 = 132.8 gram

Q: ) Cobalt―60 is a radioactive isotope with a half-life of 5.26 years and emits beta particles.…

A: Radioactive nuclei undergo disintegration with time. They emit different kind of particles and…

Q: The half-lives of different radioisotopes are given in the table. Radioisotope Half-life (min)…

A:

Q: Since the radioactivity of 233UF6 with a mass of 0.420 g is 9.88 * 104 Bq, find the half-life for…

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Q: If you start with a 13.16 g sample of Pt197which has a half-life of 19.89 hours, what is the mass of…

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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: 2.103 Phosphorus-32 has a half-life of 14.3 days. Beginning with a 2.00 pug sample of this…

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Q: A rock contains 0.232 g of Pb-206 to every 1.00 g of U-238. Determine the age of this rock assuming…

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Q: The half-life of Po-218 is 3.05 minutes. How many minutes does it take for a sample of Po-218 to…

A: Given: Half-life of Po-218 = 3.05 minutes. And the final amount of Po-218 isotope remaining = 2.35 %…

Q: The beta decay of cesium-137 has a half-life of 30.0 years. How many years must pass to reduce a 25…

A: We have given that The beta decay of cesium-137 has a half-life of 30.0 years. How many years must…

Q: A wooden statue found in Egypt has a carbon-14 content that is three-fifths of that found in living…

A: Given: A wooden statue found in Egypt has a carbon-14 content that is three-fifths of that found in…

Q: A sample of Uranium-234 has been decomposing. If the original mass of 234U is 2.57milligrams, how…

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

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Q: Iron-59 is a radioisotope that is used to evaluate bone marrow function. What is the half-life of…

A: Given, t = 190 days t1/2 = ?

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

A:

Q: Calculate the half-life of a radioisotope if it takes 144 years for a sample to decay to 12.5% of…

A: N = 0.125 No N/No = 0.125

Q: 24 Am is used in many home smoke alarms. It has a decay half-life of 457 years. How long does it…

A: All radioactive decay follows first order kinetics. So in order to solve for the time required we…

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: In part of the decay series of radium-226, polonium-218 decays to lead-214, which then decays to…

A:

Q: Cobalt-60 is radioactive and has a half life of 5.26 years. How long would it take a sample to decay…

A: Given- Half life=5.26 years  Initial amount=1.90mg Final amount=1.50mg

Q: The half-life of cobalt-60 is 5.27 yr. How much of a 1.000-mg sample of cobalt-60 is left after…

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Q: A 50.0 mg sample of an unknown radioactive substance was placed in storage and its mass measured…

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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.…

Q: How many half-lives have passed in each of the following situations? How much of a 48.0 g…

A: 1. The given half life of iodine-134 is 50 minutes. The total number of half-lives observed in 150…

Q: For the nuclear reaction 0.je + 110 48Cd 110 47Ag → Starting with 200. g of Ag-110 in a container,…

A: No of half lives in 756 days are 3. And mass left of reactant is 25 g

Q: If a rock sample was found to contain 4.30 x 10-7 mol of argon-40, how much potassium-40 would also…

A: Nuclear disintegration follows first order kinetics  λ=2.303 log(A0/A)/t  λ=0.693/t1/2 or 0.693/t1/2…

Q: an artifiact has a carbon-14 concentration that is 12.5%(1/8th) of that found in living organisms.…

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Q: How much of a 0.15 g sample of U-238 after the passage of 3200 years? Half-life is 4.01x10^9 years.

A:

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

A: Given: The half-life for the decay of carbon= 5.73×103 years The activity of fresh wood sample= 99…

Q: 1. A sample of einsteinium-252 decayed to 64.3% of its original mass after 300 days. a) What is the…

A: The rate law for the 1st order reaction is given by, k=1tln[A]0[A] where k is the rate constant, t…

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

A:

Q: The half-lives of different radioisotopes are given in the table. Radioisotope Half-life (min)…

A: Given: Half life of argon = 1212 min. Time passed = 2424 min. And initial amount of argon = 4.8 g.

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

A: The spontaneous disintegration of alpha, beta and gamma radiations by a substance irrespective of…

Q: A wooden artifact from an ancient tomb contains 30 percent of the carbon -14 that is present in…

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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: A volcanic eruption melts a large chunk of rock, and all gases are expelled. After cooling, argon-40…

A: Half-life of potassium-40 = 1.25 x 109 year A = The final amount of 40 K left = 1.38 mmol  A0 =…

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)