Part A: In the reaction shown, three half-lives have passed Part B The half-life of phosphorus-32 is 14.26 days. Calculate its decay constan

Q: The half-lives of different medical radioisotopes are given in the table. If the initial amount of…

A: Chemical kinetics is the branch of chemistry that mainly deals with the rate of reaction and change…

Q: Question attached

A: Given:-               The first order reaction formula is: Half life T12 = 13.27 hours…

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 an isotope decayed to 84.1% of its original amount after one year. What is the half-life…

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Q: Iodine -125 emits gamma rays when it decays to Tellerium -125 and has a half life of 60 days. If…

A: Given, half life of Iodine -125 t1/2 = 60 days            initial mass of Iodine -125 = 0.020 g The…

Q: Iodine-131 is used medically for the diagnosis of thyroid illnesses. The rate constant for t decay…

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Q: Iodine-131 used to treat hyperthyroidism, has a half-life of 8.04 days. For a sample containing 10.0…

A: Half life time = 8.04 days  Initial mass = 10.0 μg  Time = 32.2 days Mass remain after 32.2 days = ?…

Q: Thorium, a rare element in the earth's crust, has over seven radioactive isotopes. Of of these Th…

A: The rate of the reaction is referred to the change in the molar concentration in the distinct…

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

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Q: On irradiation of a radioactive element with neutrons, a radiochemist discovered a new nuclide…

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Q: The half-life of sodium-24 is 15.0 hours. What percentage of a sample of sodium-24 remains after…

A: Given: Half life of Na-24 , t1/2 = 15.0 hr given time , t = 60.0 hr Let the amount of sample of…

Q: Iodine – 125 emits gamma rays when it decays to Tellerium-125 and has a half-life of 60 days. If a…

A: The radioactive decay always follows the first order kinetics. The radioactive decay of I-125 must…

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

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Q: Hydrogen-3 has a half-life of 12.3 years. How many years will it take for 890.0 mg 'H to decay to…

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Q: Suppose 67.5% of a sample of radioactive 24Na has decayed after one day. Estimate the half-life of…

A: Solution is given below in next step

Q: The radioisotope phosphorus-32 is used in tracers for measuring phosphorus uptake by plants. The…

A: Radioactivity follows First order reaction.   For First order reaction : t1/2 = 0.693k where, t1/2 =…

Q: A one-milligram sample of Cu-64 (nuclear mass = 63.92 g) has an activity of 3.82 x 10 3 Ci. a. How…

A: (a) Calculate the number of moles of Cu-64: 1 mg = 0.001 g No. of moles=MassAtomic mass=0.001 g63.55…

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

A: All radioactive decays are first order reactions. The integrated rate law for 1st order reaction is…

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: he half-life of radioactive Bk-248 is 23.7 h.   How long does it tak

A: Radioactive decay follows the first order kinetics  its decay constant   λ = 2.303t log NoNwhere…

Q: 24 Am is used in many home smoke alarms. It has a decay half-life of 457 years. How long does it…

A: All radioactive decay follows first order kinetics. So in order to solve for the time required we…

Q: Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET),…

A: Hii there, since there are multiple questions posted. We are answering first question. If you need…

Q: In medical application prior to having an MRI, a patient will be administered a dye containing a…

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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: Phosphorus-32 is used in biochemical studies to follow the pathway taken by metabolites. Its…

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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: 20. lodine - 125 emits gamma rays when it decays to Tellerium-125 and has a half-life of 60 days. If…

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Q: lodine - 125 emits gamma rays when it decays to Tellerium-125 and has a half-life of 60 days. If a…

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Q: (5) The half life of sodium-24, which diminishes by first order radioactive decay, is 15.0 hours. A…

A: Given, the half-life is for sodium-24 Time for first order decay = 15.0 hours Now, calculate the…

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: Phosphorus-32 is a commonly used radioactive nuclide in biochemical research, particularly in…

A: Answer: Given data: t1/2=14.3dayst=33.0days Mass of sample m=188mg

Q: Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET).…

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Q: 18.6% of a sample of zinc-65 decays in 64.4 d, what is the half-life of this isotope (in days)?

A: We know that, for any radioactive decay, the rate constant is  K = (1/t) ln (No/ N) Where  K = rate…

Q: The half-life of radioactive chromium-51 is 28 days. If a sample of chromium-51 has a mass of 12.0…

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Q: If a tree dies and the trunk remains undisturbed for 1.775 × 10⁴ years, what percentage of the…

A: Given-> Half life = 5730 year  Time = 1.775 × 104 year.

Q: he half-life of polonium-210 is about 140 days. How much of a 150g sample remains after t years?

A: The rate of the reaction is referred to the change in the molar concentration in the distinct…

Q: original

A: t1/2 =  8.02 days t = ? for 99% decay

Q: Calculate the half-life of an isotope if 155.2 mg disintegrates to 19.40 mg in 12.9 min.

A: Given    Initial Amount [ A ]0         = 155.2 mg    Remaining amount [ A ]t  = 19.40 mg   Time ( t…

Q: Carbon-14 has a half-life of 5,730 years. If a sample contains 70 mg originally, how much is left…

A: Half-life period (t1/2) is the amount of time required for a quantity to fall to half of its value…

Q: unknown sample contains radioactive element U-235. If the original amount present is 3500 atoms, how…

A: Given- Number of initial atom =3500 atoms Number of final atom =125 atoms  Half life =700 million…

Q: The half-life for P-32, a radionuclide used in DNA sequencing, is 14.28 days. Calculate the…

A: All natural and artificial radioactive decays follows first order kinetics The integrated rate…

Q: If 28.0% of a sample of technetium-99 decays in 2.84 hours, what is the half-life of this isotope…

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

A: Solution -

Q: Copper(II) acetate containing copper-64 is commonly used to study brain tumors. This isotope has a…

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Q: Phosphorus-32 has a radioactive isotope used as a tracer in the liver. The half-life of…

A: All radioactive decay reactions follow first order kinetics Given  Half life of Phosphorus-32 (t1/2)…

Q: If a tree dies and the trunk remains undisturbed for 1.635 × 10⁴ years, what percentage of the…

A: Given, time t = 1.6 x 104 years , half life t1/2 = 5730 years

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: The half-life of bromine-74 is 25 minutes.  How much of a 40 cpm sample is still active after 75…

A: Since bromine-74 is a radioactive element  hence it will have decay reaction  And since the decay…

Q: he argon-41 in a sample has an initial decay rate of 34,500 disintegrations/min. Seventy five (75.0)…

A: l