Fluorine-18 undergoes positron emission with a half-life of 1.10 x 10- take for the amount of fluorine-18 to drop to 83 mg? (Assume that none of the fluorine is excreted from the body.) minutes. If a patient is given a 248 mg dose for a PET scan, how long will it 99 minutes 1.3 x 102 minutes O 2.1 x 102 minutes O 1.7 x 102 minutes O 3.00 x 102 minutes

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A: To solve this problem we have to first calculate the rate constant of the reaction using half life…

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A: We know that,→ Radioactivity Phenomena follow first oroen kinetics.So, Rate = KA1 K → Rate…

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

Q: Na-24 is a radioactive isotope that has a half-life of 15 hours. What percent of the original sample…

A: Radioactive decay follows first order kinetics.  k = 0.693/t0.5 ....(1)  Here, t0.5 = 15 hours…

Q: [Refere A 1.14 g sample of a radioactive isotope decays to 0.87 g in 36.3 hr. What is the half-life…

A: Given  Initial Amount [ A ]0   = 1.15 gram  Remaining Amount [ A ]    = 0.87 gram  Time ( t ) = 36.3…

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Q: The naturally occurring isotope rubidium-87 decays by beta emission to strontium-87. This decay is…

A: Amount of rubidium = 123.0  μg  Amount of strontium = 5.5 μg Half life time of rubidium = 4.8 × 1010…

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Q: Element X has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10…

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Q: 2Bi is a radioactive isotope of the element bismuth with a half-life of 19.7 minutes. What…

A: Given: half-life of isotope of bismuth is 19.7 minutes.

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

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Q: Barium−131 is a radioisotope used to study bone formation. A patient ingested barium−131. How much…

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Q: Yttrium-90 is a radioactive isotope used to treat tumors in the liver. 90 Y has a half-life of 2.67…

A: Given : Half life of 90Y = 2.67 days. And mass of 90Y remaining after 1.03 days = 4.02 µg

Q: 17. If it takes 12 half-lives for a radioactive chemical (k = 4.85 x 10-2 day¹) to decay to a level…

A: Half-life is the time taken for half of the radioactive atoms of a specific radionuclide to decay

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Q: Cesium-134 is a β emitter with a half-life of 2.0 years. How much of a 2.50-g sample of cesium-134…

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Q: One of the radioactive isotopes used in chemical and medical research is iodine-125, which has a…

A: Given Half life of I-125 = 61 days [I-25]t = 0.25 g[I-25]0 = 1 gNow As we know radioactive decay is…

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Q: Part 1 The half-lives of 235U and 23$U are 7.04 x 10° years and 4.47 x 10° years, respectively, and…

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Q: The half-life of Radium-226 is 8 years. How much of an initial 171 g sample will remain after 43…

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Q: The carbon-11 isotope has a half-life of 20.3 minutes. How long (in hours) will it take for 99.9999%…

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Q: Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The…

A: Since the decay reactions are first order reactions always hence for the first order reaction we can…

Q: Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The…

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Q: A scientist is taking measurements on an unknown isotope to determine its half life. If the…

A: Radioactive decay is followed first order kinetics  Decay constant                  λ =2.303t…

Q: Radioactive decay The radioactive bismuth isotope 21°BI has a half-life of 5 days. If there is 100…

A: The amount of radioactive substance remaining after t days is given by, ft=1002−t/5

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A: Welcome to bartleby !  Introduction :  We have to calculate percentage of bismuth lost . Given :…

Q: Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The…

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Q: Complete the table shown to the right for the​ half-life of a certain radioactive substance. ​…

A: Solution - Decay rate - The decay rate of a radioactive substance is characterized by the following…

Q: Phosphorus-32 is a radioisotope used to detect certain types of tumors. P-32 has an effective…

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Q: (c) Given that radioactive cobalt-60 has a radioactive constant equal to 7.6 x 10 s', determine its…

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Q: 17. Tritium, (3H) is used in glowing “EXIT" signs located where there is no electricity for light…

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Q: lodine-131 has a half-life of 8. l days. How much of 2 g of the isotope will remain after 56.7 days?…

A: Half-life of iodine = t1/2 =  8.1 days intial amount = A0 = 2 g  final amount = A =  ? g  Time given…

Q: Strontium-90 is produced during the nuclear fission of uranium-235 and is part of nuclear fallout…

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Q: If the half-life of a radioactive element is 219.3 years and the atomic weight of the radioactive…

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Q: A radioactive element has a physical half-life Tp = 200 days and a biological half-life T, =70 days.…

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Q: Krypton-81 has a half-life of 2.29 × 105 years. A 750-mg sample of Krypton-81 undergoes electron…

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Q: Chromium-51 nuclide is used in studies to evaluate the lifespan of red blood cells and bone marrow…

A: Chromium-51 is a commonly used radionuclide with a half-life of 27.7 days, emitting gamma rays with…

Q: Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The…

A: Radioactive decay follow first order kinetics.

Q: 1) P-32 has a half-life of 14.3 days. How many milligrams of phosphorus-32 remain after 57.2 days if…

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Q: The ¹H nucleus is composed of a single proton and therefore has a mass loss of 0 g/mol. Select the…

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Q: lodine-131 is administered orally in the form of Nal(aq) as a treatment for thyroid cancer. The…

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Environmental Pollution

Environmental pollution occurs due to some unwanted alteration in the surroundings which results in unfavorable effects on all organisms of that surrounding.