What is the ½-life of a radioisotope if it decays to one eighth of its radioactivity in 66.0 years?   ___________ years

Q: A medical technidan is working with the four samples of radionuclides listed in the table below.…

A: Calculations for all the samples is done below.

Q: The half life of a specific Tc-99m is 9 hours. How much of an 389mg sample will have decayed after…

A: Welcome to bartleby !  Introduction :  We have to calculate amount of sample decayed .

Q: A sample of organic origin was tested to determine its approximate age. About 63%of its C-14 had…

A: We have to predict the age of sample.

Q: Calculate the half-life of a radioisotope if it decays to 12.5% of its radioactivity in 12 years.

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Q: Zinc-62 decays with a half-life of 9.186 hours. After 12.80 days, a radioactive nuclide has passed…

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Q: 1. A 20 mg sample of a pesticide has a half-life to 25 years. How long would it take to reduce the…

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Q: About what percentage of the original radioactive sample will be left after 8 minutes? The half-life…

A: Given,  Time = t = 8 8 minutes Half-life period = t1/2 = 2 minutes Percentage of the original…

Q: Phosphours-32 is a commonly used radioactive nuclide in bichemical research, particularly in sutdies…

A: Mass of P-32 present in 175 mg of  Na332PO4 Molar mass of  Na332PO4 = 164 g/mol  164 g  Na332PO4…

Q: The half-life of 42K is 12.5 h. How much will remain after 101 h if the original sample contained…

A: Given: The half-life of 42K = 12.5 h. Initial amount of sample =256 g Time =101 h To determine:…

Q: The steps below show three of the steps in the radioactivedecay chain for 23290Th. The half-life of…

A: (a) The chemical equation for the reaction is given below - The first reaction (i) is an alpha…

Q: Radioactive cobalt-56 decays with a half-life of 77.2 days. a. What is the value of k in s12 k = b.…

A: Radioactive disintegrations always happen as per first-order kinetics in which reaction rate for…

Q: A hepatobiliary scan is a common technique used to assess the functionality of a patient's…

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Q: A) A piece of charcoal that has one-half the radioactivity of a living tree died approximately 5,568…

A: Radioactive decay follows first order kinetics. It has the following relation between t1/2 and k: k…

Q: Calculate the half-life of a radioisotope if it takes 24 years for a sample to decay to 12.5% of its…

A: Radioactive decay follows first order kinetics. Half-life is the time taken by a radioisotope to…

Q: If 28.0% of a sample of erbium-165 decays in 4.74 hours, what is the half-life of this isotope (in…

A: Half life period of a reaction:-   The time during which the concentration of a reactant is Reduced…

Q: 225 AC 9.9d 221Fr deday hhoun minutes econds msmillseconds eroseconds 4.8 m x1 32 ms X2 X3 42 ya…

A: In Q3. We have to simply use the first order kinetic to find the time . Kt = ln ( Initial…

Q: The isotope 32P emits radiation and has a half-life of 14.3 days. Calculate the decay constant in…

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Q: link to access the section in your eText. Radium-223 decays with a half-life of 11.4 days. Part A…

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Q: Vhich of the following is the half-life ( in days Jof a radioisotope if it decays to 10.5% of its…

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Q: A medical technician is working with the four samples of radionuclides listed in the table below.…

A: t12 = ln 2K      ⇒ K =ln2t12      , Initial radioactivity  r = KN

Q: Th-234 has a half-life of 24.1 days. If a 355 mg sample is initially present, how many half-lives…

A: Given  Half life ( t1/2 )  = 24.1 days  Initial amount  = 355 mg  Time ( t ) = 96.4 days  Number of…

Q: Suppose a sample of a certain substance decayed to 73.4% of its original amount after 300 days.…

A: Since, you have not mentioned about the order of the reaction, I have assumed it to be the 1st order…

Q: Chemistry The 35S atom on a radiolabeled amino acid, methionine, has a half-life of 87.4 days. What…

A: In a radioactive element, the decay of the nucleus of the element takes place due to the imbalance…

Q: After 12.80 days, a radioactive nuclide has passed through exactly five half-lives. The initial…

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Q: 4Na decays β- with a half-life t1/2=15 hours. A solution containing 0.050 μCi of 24Na is injected…

A: Given the half-life of 24Na, t1/2 = 15 hour Disintigration constant, λ = 0.693t1/2 = 0.69315 hr =…

Q: After 119 days have elapse 1/21 of a radioisotope sample remains undecayed. What is the half-life of…

A: Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A…

Q: A 50 gram sample of a radioisotope undergoes 2 half-lives.  How many grams would remain at the end?

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Q: The half-life of U23892 undergoing α-decay is 4.5 × 109 years. What is the decay rate for a 1.0-g…

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Q: Example 3 - A sample to be used for medical imaging is labeled with 18F, which has a half-life of…

A: The half-life of 18F is = 110 min The percentage activity after 300 minutes is =?

Q: A patient is given 1.11 ug of a radioactive isotope with a half-life of 3.13 hours. How many hours…

A: (a). Given: The initial amount of the radioactive isotope, [A0] = 1.11 μg The remaining amount of…

Q: 3. Cobalt-60 is a strong gamma emitter that has a half-life of 5.26 yr. The cobalt-60 in a…

A: Given, half life of Cobalt-60 =5.26 yr date of purchase of sample = June 2010

Q: What is the half-life (in y) of a radioisotope if it decays to 25% of its radioactivity in 13.5…

A: The formula for radioactive decay constant of a radioactive reaction is as follows :- k = 2.303t log…

Q: The radioactive isotope phosphorus-32 is often used in biochemical research. Its half-life is 14.28…

A: Given: The half-life of phosphorus-32 is 14.28 days. The mass of sample of K332PO4 is 118 mg.

Q: How to solve the following: 1.) In 1990, the remains of an apparently prehistoric man were found in…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: A hazardous material was found to decay at a rate proportional to the amount present. Initially,…

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Q: A sample of sodium-24 was administered to a patient to test for faulty blood circulation by…

A: Given that, Half life of sodium24=15 h We have decay constant, k=0.693t12..............1 we have an…

Q: The technique known as potassiumargon dating is used to date volcanicrock and ash, and thus…

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Q: The natural radioisotope, radium-226 (226Rn), undergoes a radioactive decay where it emits an alpha…

A: All radioactive decay follows first order kinetics. So the amount after 5 days can be calculated…

Q: 60/27 Co decays with a half-life of 5.27 years to produce 60/28 Ni.(a) What is the decay constant…

A: Radioactive disintegration follows first order kinetics. They are independent of temperature…

Q: The half-life of strontium -90 is 28 years. How long will it take a 40 mg sample to decay to a mass…

A: Given :-  Half life i.e. t1/2 = 28 years  Initial amount of sample = 40 mg  Final amount of sample =…

Q: 137Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A: Since you have posted multiple independent questions in the same request, we will solve the first…

Q: A freshly isolated sample of 0Y was found to have an activity of 7.7 x 105 disintegrations per…

A: All nuclear reactions follow first order kinetics. For first order reaction- ln (At/Ai) = -kt At:…

Q: The radioactive isotope Pu-238, used in pacemakers, has a half-life of 87.7 years. If 1.9 milligrams…

A: Given : Half - life = 87.7 years Initial Pu-238 = 1.9 mg

Q: A radioactive sample has a decay constant of 1.32 x 10-3 h-1. What is its half life?

A: Radioactivity is a first order kinetics. Relation for decay constant ( λ) and t1/2 relation for…

Q: The rate constant for the decay of unstable nuclide X by alpha-particle emission is 1.17x10 /day.…

A: Given : Rate constant for the decay of X = 1.17 X 10-6 day-1

Q: What is the half- life of a radioisotope if it decays to 12.5% of its radioactivity in 12 years?

A: Let the initial concentration of the radioactive substance be A. The concentration of the substance…

Q: How old is a rock if the mineral biotite from the rock has 25,000 40K atoms and 75, 000 40Ar atoms?…

A: Every atoms of Ar produce from k. Answer 2.6 days

Q: A patient swallows a radiopharmaceutical tagged with phosphorus-32 ( 32P), a B- emitter with a…

A:

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.