A radioactive sample with 500 g of radioactive material decayed into 150 g in 15 days. Calculate the half life of the given sample.
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: A radioactive sample has a decay constant of 55.0 x 10-¹2 s¹. Estimate its half-life.
A: Radioactive decay is the process by which unstable nuclei spontaneously lose energy to become…
Q: Suppose that you start with 3.65 g of a pure radioactive substance and determine 19.6 h later that…
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Q: After 1.82 days, the activity of a sample of an unknown type radioactive material has decreased to…
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Q: The isotope cobalt-60 has a nuclear mass of 59.933820 u. Calculate the mass defect of cobalt-60…
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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: One hundred kilograms of a certain radioactive substance decay to 40 kg after 10 years. How much…
A: Given data The initial mass of the radioactive substance is: Xo = 100 kg The mass of the radioactive…
Q: Atts, you have a pure sample of an unknown substance. At t= 293 s, 36.8% of the substance remains.…
A: Radioactive substance remaining at t=293s, N=36.8100×N0=0.368N0
Q: Radon gas has a half-life of 3.83 days. If 2.86 g of radon gas is present at time t = 0, what mass…
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Q: A radioactive sample with a half life of 4.8 weeks has 3.05e+15 nuclides present in the initial…
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Q: A freshly prepared sample of a certain radioactive isotope has an activity of 3,7 × 1011 decays/s.…
A: Given quantities: initial activity of the isotope (A0) = 3.7 × 1011 decays/s activity of the isotope…
Q: A radioactive sample is observed for 160 days. After 160 days the amount of the sample is found to…
A: Radioactive decay is the process by which an unstable nucleus becomes stable. The rate at which this…
Q: A geologist finds an old rock and wants to determine its age using rubidium-strontium dating. This…
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Q: A sample of the radioactive nuclide 199Pt is prepared that has an initial activity of 7.80×1011 Bq…
A: a) We know , half life t12=t ln2ln NoNtinitial activity = 7.8x1011next activity = 9.45x1010
Q: The radioactive isotope 209 Po has a half-life of 103 years. How long would it take 84 for only 4.00…
A: Given: The half-life time is 103 years. The remaining sample is 4 g. The total amount of the sample…
Q: A radioactive isotope has an activity of 9.34×104 Bq initially. After 3.10 hours the activity is…
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Q: radioactive sample initially undergoes 12.0×10^4 decays/s. Twenty-four hours later, its activity is…
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Q: A radioactive sample is observed for 5 days. After 5 days the amount of the sample is found to be…
A: Radioactive decay is the process by which an unstable nucleus becomes stable. The rate at which this…
Q: Radium-226, 226Ra, undergoes an alpha decay. The current sample of Radium-226 has an initial…
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Q: An 10 g sample of a radioactive element takes 5432.6 years to reduce into 1 g. Calculate the…
A: Radioactive decay takes place when an unstable nucleus becomes stable. The instability arises due to…
Q: Which of the following statements are true (or at least aren't obviously false)? Choose all that…
A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…
Q: radioactive
A: Given: The remaining sample = 0.004 of the original value
Q: A radioactive sample has an activity of 250 Bq and contains 6.52×10¹³ radioactive nuclides. Estimate…
A: The rate at which this decay takes place in a given sample of radioactive material is called its…
Q: You have an istope with a decay constant of 2.48x10-³s-¹. What is the half life of isotope?
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Q: A radioactive sample has a decay constant of 2.97 x 10 s¹¹. Estimate the half-life.
A: Unstable nuclei decay into a stable state. This process is called radioactivity. The rate at which…
Q: What is the half-life of an isotope that decays to 6.25% of its original activity in 60.2 h?
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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: After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. If an…
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Q: Tritium, or hydrogen-3, is formed in the upper atmosphere by cosmic rays, similar to the formation…
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Q: A radioactive substance decays from 60mg to 12.6mg in 20 years according to the exponential decay…
A: Given value--- decays from 60mg to 12.6mg in 20 years . We have to find--- a) find the b -value…
Q: A sealed box containing alloys of metal A and Metal B consisting of the same parts accordingly.…
A: We need to find the age of the alloy based on the given information.
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- A sample of carbon of mass 6.74 g taken from an animal jawbone has an activity of 4.00 decays/min. How old is the jawbone in years?Marie and Pierre Curie managed to extract 1 mg of radium from ten tonnes of uranium ore in 1898. The number of atoms in 1 mg of radium is 2.66 x 10¹8. Calculate a) The decay constant for radium-226A radioactive sample is prepared; 10.78 hours later, only 1/16th of the original sample remains. What is the half-life of this radioactive sample in hours? Round to one decimal place.
- A 10 g sample of a radioactive element took 12 days to reduce into 1 g. Calculate the half-life and identify the element.The mass defect for potassium-40 is: -___x10-28kg. (Give your answer with 3 sig digs and do not include units) Use mass of proton = 1.007276 u mass of neutron = 1.008665 u actual mass = 39.9687 uA 5 g sample of a radioactive element takes 102 days to reduce into 3 g. Calculate the half-life and identify the element.
- A radioactive sample with a half-life of 5.3 weeks has 1.04e+15 nuclides present in the initial sample. a) What is the initial activity of this sample? Bq b) How many days does it take for this sample to decay to 3.09e+14 nuclides? daysA 10 g sample of a radioactive element takes 16.21 mins to reduce into 6 g. Calculate the half-life and identify the element.After 1.86 days, the activity of a sample of an unknown type of radioactive material has decreased to 88.2% of the initial activity. What is the half-life of this material?
- How many days The half-life of a radioactive isotope is 140 d. would it take for the decay rate of a sample of this isotope to fall to one-fourth of its initial value?If it is known that 87% of an initial radioactive sample remains after 3 days, what is the decay rate λ of the sample in units of decays/day?Question 1. Tritium has a half - life of 12.33 years. What fraction of the nuclei in a tritium sample will remain (a) after 5.00 yr? (b) after 10.0 yr? (с) after 123.3 yг?