Suppose that you are given a 200 gram sample of a radioactive substance with a half-life of 45 days. How many grams will be left after 360 days?
Q: A particular radioactive material was weighed exactly 1 year ago, showing a mass of 200 g. If the…
A: Given: Mo=200 gM=23.0 gt=1 year = 365 days
Q: Plutonium-239 has a half life of 24100 yr. Starting with a sample of pure 239 Pu, how long would it…
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Q: The activity of a radioactive isotope is 16000 disintegrations/sec. The activity drops to…
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Q: A radioactive isotope has an initial activity of 8000 decays per second (dps). If its half-life is…
A: In radioactive decay, the number of radioactive atoms and their activity decrease over time.The…
Q: A radioactive series consists of two different radioactive materials. One radioactive material with…
A: Given that: Decay constant of parent nucleus = k1 Decay constant of daughter nucleus = k2 y1(0)=a…
Q: After how many half-lives will (a) 10.0%, (b) 5.00%, and (c) 1.00% of a radioactive sample remain?
A: Formula to calculate the number of half-lives is,
Q: A radioactive isotope decays at a rate proportional to the amount present at time t and has a…
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Q: A certain radioactive nuclide decays with a disintegration constant of 0.0256 h. (a) Calculate the…
A: We have, disintegration constant, λ=0.0256 h-1 we have to find the half-life, a fraction of the…
Q: archaeologist sometime in the future analyzes the iron used in an old building. The iron contains…
A: half life of Ni -63 t/2 = 92 years LET x half life passed (N0 /2)X =( N0 / 128 ) = (N0 /2)7 X = 7…
Q: The half life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
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Q: Strontium is chemically similar to calcium and can replace calcium in bones. The radiation from ⁹⁰Sr…
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Q: Choose the BEST answer to the following. A radioactive sample has a half-life of 1 hour. Starting…
A: The number of half -life passed in a time is,
Q: Use the following half-life graph to answer the question: What is the mass of the radioactive…
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Q: A radioactive sample containing approximately 6.52×10¹3 radioactive nuclides has a half-life of 5730…
A: Radioactive nuclides are those nuclides that are unstable. This happens due to the mismatch between…
Q: If you start out with 20 grams of a radioactive material, and 4 hours later you have 5 grams of that…
A: Given data: Initial amount of material (N0) = 20 g Time (t) = 4 hours Remaining amount of material…
Q: Consider a fictional radioisotope X (311.1766 amu) a. If a 0.750 g sample of X-311 releases 5.75 x…
A: Given that:Atomic mass, M=311.1766 amua) m=0.750 g=0.750×10-3 kgN=5.75×1016Mass of alpha particle,…
Q: A particular radioactive material was weighed exactly 1 year ago, showing a mass of 200 g. If the…
A: a) Calculate the decay constant. N(t)=Noe-λt λ=1tlnNoN Substitute the values. λ=1365 daysln200 g7.1…
Q: A sample initially consists of No radioactive atoms of a single isotope. After a time, t, the number…
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Q: Suppose we have a sample containing 1.91 mCl of radioactive 131 (t,2 - 8.04 d). (a) How many decays…
A: Solution: Given that half-life of the sample, t1/2 = 8.04 days = 694656 s. Time for decay, t = 5week…
Q: Use the equation for radioactive decay and solve for an algebraic expression for the time, “t” in…
A: Heavier nucleus are unstable. This is because there is increase in number of protons. This increase…
Q: A radioactive sample contains 1.55g of of an isotope with half a life of 3.8 days. How much of the…
A: Given data: Original amount of substance (N0) = 1.55 g Half life (T1/2) = 3.8 days Time (t) = 11.4…
Q: Tritium, or hydrogen-3, is formed in the upper atmosphere by cosmic rays, similar to the formation…
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Q: After 2 days, 10 grams of a radioactive substance s present. Three days later, 5 grams is present.…
A: GivenAfter 2 days , Radiaoactive substance (A)=10 gThree Day later , Radiaoactive substance (A)=5…
Q: A radioactive sample contains 9.5 x 1017 atoms of a nuclide that decays at a rate of 5.4 x 1013…
A: Radioactivity is the process of decay of heavy nuclei due to an unstable nuclei or due to a…
Q: What percentage of a radioactive substance remains after 7.00 half-lives have elapsed?
A: Time=7 half life
Q: Radon 23Rn produces a daughter nucleus that is radioactive. The daughter, in turn, produces its own…
A: To Determine: The total number of Nα and Nβ- particles that are produces in this reaction.
Q: A patient is injected 465 MBq of radioactive isotopes with a half life of 110 minutes. How much…
A: Given: Half life, T=110 min=6600 s Radioactive injected in a body, N0=465 MBq Let's find the…
Q: A radioactive sample is prepared; 10.78 hours later, only 1/16th of the original sample remains.…
A: Activity N=N0e-λt 10.78 hours later, only 1/16th of the original sample remains N016=N0e-λ10.78…
Q: After 1.86 days, the activity of a sample of an unknown type of radioactive material has decreased…
A: The objective of this question is to find the half-life of a radioactive material given the time it…
Q: A sample of carbon-14 initially consists of 5 × 10 24 particles. Carbon-14 has a half- life of 5730…
A: Solution: a. Calculate the decay constant for carbon-14 using the following relation. k=0.693t12…
Q: 16. What is the decay rate of carbon 147 Express your answer in yr. 17. In dating using radiocarbon,…
A: Solution: 16. The decay rate is given in terms of half-life of radioactive material is given by,…
Q: Assume that the rate of decay of a radioactive substance is proportional to the amount of the…
A: Given: The decay rate is directly proportional to amount of the substance being present. On…
Q: Question 1. Tritium has a a tritium sample will remain (a) after 5.00 yr?
A: GivenHalf Life for Tritium, t1/2=12.33 years
Q: After 2.14 days, the activity of a sample of an unknown type radioactive material has decreased to…
A: Given,Time, t = 2.14 daysThe activity decreased is 82.2%The initial activity = R0The activity after…
Q: Two radioactive isotopes, X and Y, both decay to stable products. The half-life of X is about a day,…
A: The term "half-life" is used in the areas of physics and chemistry that deal with radioactivity and…
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