A 1.55 g sample of an isotope has a half-life of 3.8 days. What mass of sample is left after 5.5 days? t1/2=0.693/k ln(Nt/N0)=-kt Answer in the form x.yz g

Q: A 6.2 mg sample of 90Sr (half-life 29.12 y) is in secular equilibrium with its daughter 90Y…

A: a) At equilibrium        λsrNsr = λyNy              Nsr = λyNyλsr                     = 29.12y365…

Q: The fraction of a radioactive isotope remaining at time tis  (1/2)t/t1/2, where t1/2is the…

A: Given: a) Fraction of Carbon-14 in a piece of charcoal after 10.0 yr is calculated as shown below,

Q: A patient receives 9.0 ng of a radioisotope with a halflife of 12 h. How much will remain in the…

A: Radioactive elements are those which undergoes the spontaneous reactions (may be fusion or fission)…

Q: Krypton-79 has a half-life of 34.50 h. After 138.0 h, 54.25 kg of this radioistope is left. How much…

A: Given, the half-life of Krypton-79 is 34.50 hthe amount of radioisotop left after 138.0 h is 54.25…

Q: Fossilized tortoise shell was discovered in an ancient cave dwelling in northern Philippines. A…

A: We have given The ratio of C-12 and C-14 in living organisms = Nt =  4.12 d/min-g The ratio of C-12…

Q: ome Tools Section 5.5 Exercis... x Section 5.5 Proble.. Section 5.5 Proble... CRA 6 / 15 +) 106% 6.…

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Q: 15. A mammoth skeleton has a carbon-14 decay rate of 0.48 disintegrations per minute per gram (0.48…

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Q: 8. Patients with Graves disease have an overactive thyroid gland, and are commonly treated with…

A: Given the half-life of I-131, t1/2 = 8.0 days Initial activity, Ao = 9.9 mCi

Q: A 1.00-gram sample cantains two radioactive isotopes A and B. The half-life of isotope A is 2 hrs.…

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Q: A mammoth skeleton has a carbon-14 decay rate of 0.48disintegrations per minute per gram of carbon…

A: Radioactive disintegration follows first order reaction and decay rate equation can expressed as,…

Q: 100 grams of an isotope with a half-life of 36.0 hours is present at start. How much time will have…

A: Radioactive decay follows first order kinetics. Given that half life is 36 hours. So the rate…

Q: The isotope 83212Bi has a half-life of 1.01 years. What mass (in mg) of a 2.00-mg sample will not…

A:

Q: A radioactive isotope has a half-life of 2.1 years. If 55.8 mg of the radioactive isotope is present…

A: Radioactive disintegration processes follow first order kinetics Given Half life (t12) = 2.1 years…

Q: The isotope ²¹²₈₃Bi has a half-life of 1.01 yr. What mass (inmg) of a 2.00-mg sample will remain…

A: Given, half life of  ²¹²₈₃Bi ,  t1/2 = 1.01 yr = 365 x 24 x 1.01 h = 8847.6 h            initial…

Q: At the beginning of an experiment, a scientist has 244 grams of radioactive goo. After 105 minutes,…

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Q: An ancient skull has a carbon-14 decay rate of 0.85 disintegrationsper minute per gram of carbon…

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Q: mammoth skeleton has a carbon-14 decay rate of 0.0077 disintegration per second per gram of carbon.…

A: We need to find out how long ago the mammoth lived.  We are given the carbon-14 decay rate i.e.…

Q: (Q111) In the next step of the neptunium-237 decay series, very unstable francium-221 is produced.…

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Q: 12% of a certain radioisotope decay in 5.2 years, what is the half-life of this isotope?

A: Note : As per our guidelines , we are supposed to answer first question .Please resubmit the other…

Q: The mass defect for some nuclear decay of an isotope is .27805 amu. How much energy is released when…

A: Given : Mass defect of isotope = 0.27805 amu. And moles of isotope decaying = 1 mol.

Q: A sample initially contains 300 µg of 32Si (31.97415 amu), which decays with a half-life of 160…

A: The nuclear reactions are a type of chemical processes which lead to the formation of some new…

Q: Suppose that the initial mass of a radioactive substance is m and the half-life of the substance is…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: 8. For the radioactive nuclides in table 7.1, which one has the largest value of the decay constant?…

A: The question it is asked that among the four radioactive atoms which atom have higher value of decay…

Q: 5.) A sample of bone has a specific activity of 5.22 disintegrations per minute per gram of carbon…

A: Given:

Q: One gram of a sample of Bi decays to 0.25g after 10 days. The half life ofBi in 83 83 days is A 3 B…

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Q: 2P is a radioactive isotope with a half-life of 14.3 days. If you currently have 13.5 g of ²P, how…

A: The given data contains, t1/2 =14.3 daysPt=13.5 gP0=7 days

Q: You take a course in archaeology that includes field work. An ancient wooden totem pole is excavated…

A: The age of the sample is calculated as: Age=n×t12 where n is the number of half lives and t1/2 is…

Q: A 1.00 g sample of Ge decays to 0.87 g in 1.9 hr. What is the half-life of Ge ? 32 a. 0.073 hr b.…

A: Decay reactions are first order reactions. Given : Initial mass of reactant = 1.00 g Final mass of…

Q: For a gamma scan of a liver, a patient ingests a 15 MBq sample of 99Tc*. It decays with a 6.0 hour…

A: Option D) We expect the 35p to decay by beta-minus. The daughter nucleus is 355.

Q: Phosphorus-32 is a radioactive isotope with a half-life of 14.3 d (d = days). A biochemist has a…

A: Radioactive decomposition follows first order kinetics. Integrated rate law for first order is

Q: At the beginning of an experiment, a sclentist has 164 grams of radioactive goo. After 255 minutes,…

A: Given:Initial amount of goo, G∘= 164 gFinal amount of goo, G =5.125gtime, t =255m

Q: Q2(B). Prove that it would take 17.6 years if an old sample of 10 g Co-60 with a half-life of 5.3…

A: We know nuclear decay is first order reaction. So we need to use first order rate equation. We also…

Q: Bromine-88 is radioactive and has a half life of 16.3 seconds. What percentage of a sample would be…

A: Given,Half-life of Bromine-88 = 16.3 seconds.Percentage of sample left after 74.8 seconds has to be…

Q: 225 Ac 9.9 d 221Fr de days 4.8 m h hours meminutes Sseconds ms milliseconds usmicroseconds X1 32 ms…

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Q: 32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 77.1 g of ³2P, how…

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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: Americium-241 (241Am) is a synthetic isotope used in smoke detectors. It undergoes alpha decay to…

A: Given: Half-life of isotope = 432.2 years. Initial mass of isotope = 0.30 µg And time passed = 70…

Q: 5. A tree falls in a forest. How many years must pass before the carbon-14 mass in the tree's carbon…

A: Suppose Initial amount = Ao Amount at time, t = 3.125% Ao  Half-life, t1/2 = 5570 years

Q: A 0.0100 g sample of a radioactive isotope with a half-life (to.s) of 1.3-10° yr decays at the rate…

A: Mass of sample = 0.0100g  Half -life = 1.3 × 109yr Rate of decay = 2.9 × 104dpm

Q: 0 Question 9 180pb has a half-life of 25.5 s. If a sample of this isotope is initially 750.0 g, what…

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Q: A skull believed to belong to an ancient human being has a carbon-14 decay rate of 6.50 dis/min.g of…

A: The half life for a radioactive element can be defined as the time taken by the half of the material…

Q: 32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 30.9 g of "P, how…

A: The given information is: Half-life = 14.3 days Mass of 32P currently present = 30.9 g Since it is a…

Q: very unstable francium-221 is produced. Giver f-life of francium-221 is only 5.00 minutes, if th…

A: Given,  Half life time (t1/2) = 5.00 minutes Decay constant (k) = 0.693/5.00     =  0.1386 min-1…

Q: The radioactive isotope 212Pb has a half-life of 10.64 h. A sample containing this isotope has an…

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Q: Half-life of Element X mass How much of the parent isotope and daughter product exists after 1…

A: We need to determine how much of an isotope is left after first half life.

Q: 3. Natural thorium consists entirely of the alpha-radioactive isotopes 232Th which has a half-life…

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Q: If there is 9 umol of the radioactive isotope 32P (half-life 11 days) at t=0, how much 32 P will…

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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.