A radioactive material is disintegrating in such a way that after 24 seconds, there is only 20.5% of it left. What is the half-life of the radioactive material? Express your answer in seconds and keep three significant digits. Answer:
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Q: If a sample of radioactive isotopes takes 60 minutes to decay from 200 grams to 50 grams, what is…
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Q: If a material has a half life of 92.5 days, how long will it take for 75% of the material to decay?…
A: Half life of the material=92.5days 75% of the material decay
Q: The half-life of uranium-234 is approximately 25,000 years. How many undecayed nuclei remain after…
A: number of uranium atoms = 2.7 billion = 2.7×109 atoms half life of uranium = 25000 years =…
Q: If the half-life of Uranium 235 is 700 million years, what would its third-life be?
A: Given data: The half life of Uranium 235 is t1/2=700 million years. The expression for the…
Q: A sample of radioactive material contains 1000 atoms. A half-life of this material is 2 days. How…
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Q: Which statements about radioactive decay are correct? a) It always produces…
A: Radio active decay is a random process and we can not predict it accurely.
Q: What is the half-life of this radioactive material (Barium 137) in seconds? Now, if we waited 8…
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Q: https://www.walter-fendt.de/html5/phen/decaychains_en.htm A)Uranium -Radium series. Click on “next…
A: always remember the decay process in which helium nucleus ( 42 He) is present; it is alpha decay and…
Q: How long does it take for 70% of a given radioactive element to decay, given that its half-life is…
A: Given value--- Half life time = 8.04 days. We have to find--- How long does it take for 70% of a…
Q: a) Define the activity of a radioactive source b) The activity of a radioactive source is…
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Q: 1. A radioactive substance has a half-life period of 60 days What is the disintegration constant?…
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Q: The half-life of a certain radioactive substance is 9 years. What is the yearly decor factor?
A: Given,
Q: The half-life of radium-226 is 1600 years. How long will it take for 10.0 mg of radium-226 to decay…
A: Using half life concept to solve the problem
Q: Plutonium has a half-life of 80 million years. How long will it take for a sample of plutonium to…
A: When a nucleus becomes unstable it will undergo radioactive decay to attain a stable configuration.…
Q: raph the “Number of Nuclei in the Sample” versus the “Half-life Number.” If the sample has 1/8 of…
A: The final concentration of radioactive nuclei is We know that;Here, n is the number of half-lives,…
Q: A sample containing 1 gram of Radium-224 was stored in laboratory 100 years ago. Now the sample…
A: Given data: The mass of Radium-224 at 100 years ago is m0=1 g. The mass of Radium-224 at now is…
Q: What is "half-life"? Select one: a. The time needed for half of the radioactive atoms in a sample to…
A: Half-life is the duration of time needed for decay of the half of the radioactive atoms in a given…
Q: The half-life of a certain radioactive material is 32 days. An initial amount of the material has a…
A: Given that, Half life of the radioactive material = 32 daysInitial amount of the material = 361 kg
Q: Certain radioactive substances has a half-life of 20 min. If there is 56 lbs of it right now, how…
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Q: If a 10-gram sample of a radioactive substance has a half-life of 6000 years, how much would be…
A: We are authorized to answer one question at a time, since you have not mentioned which question you…
Q: Three quarters of nuclie in a given radioactive sample decays in 2 weeks. What is the half life of…
A: we have to find half life of the sample, in the given question.
Q: The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be…
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Q: Uranium has a half-life of 4.47 billion years! How long does it take for a sample of 100 grams to…
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Q: How long will it take for an amount of Radon-223 to decay to only 60% of the original amount? The…
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Q: Isotope X has a half-life of 100 days. A sample is known to have contained about 1,500,000 atoms of…
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Q: (20)The half-life of Carbon-14 is 5700 years. If a 16 gram sample is found in a rock layer known to…
A: N(t)=No(0.5)t/h h= half life N(t)=16 g t=42000 years h=5700 years we have to find No
Q: The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be…
A: Initial mass of isotope is Time of decay is Find:Mass of isotope after 6 half-lives.
Q: Suppose that you are given a 200 gram sample of a radioactive substance with a half-life of 45 days.…
A: Radioactive decay is the process by which unstable nuclei spontaneously lose energy to become…
Q: If a 500.0 g sample of technetium-99 decays to 62.5 g of technetium-99 remaining in 639,000 years,…
A: Initial sample () = 500 gSample after 639000 years () = 62.5 g
Q: The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be…
A: Each half-life of a radioactive isotope reduces the initial amount to half. So, after the first…
Q: A radioactive material of 20gm has 12.5 years. Who much gm of the sample will remain after 20years?…
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Q: The radioactive element 2760Co has a half life of ______ years. If you had a sample of 17 g, about…
A: Given: The mass of sample (m) = 17 g. The half-life of cobalt (T1/2) = 5.27 years. The life of…
Q: If 4 half lives have elapsed for a sample containing a radioactive isotope, and the half life of…
A: Given Half life of the given radioactive isotope t1/2= 5 million years 4 half lives have elapsed…
Q: A 250g sample of Calcium-47 has a half-life of 4.536 ????. How much Calcuim-47 remains after six…
A: Given data: Initial amount of calcium-47 (N0) = 250 g Number of half-lives (n) = 6 Required: The…
Q: Question 8 a) Define the half-life of a radioactive material. b) State the relationship between…
A: Given that: In part a, the concept of half-life in radioactive materials is defined. In part b, the…
Q: 6. The half-life of a radioactive substance is 20 minutes. If we start with 980 g, find the mass…
A: Given, Half time, t0.5 = 20 min Initial amount, No = 980g Then decay constant λ will be, If N is…
Q: An isotope of lead, 201Pb, has a half-life of 8.4 hours. How many hours ago was there 30% more of…
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