lodine has a half-life of 8.07 days. What fraction of a sample of iodine-131 will be left after 16.14 days? 1/2 A B 1/4 C D 1/8 1/16

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: The half-lives of different radioisotopes are given in the table. Radioisotope Half-life (min)…

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

Q: If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of…

A: Given : Half life of I-131 = 8 days Initial amount of I-131 = 10 mg And time passed = 24 days

Q: 2Tritium H-3 has a half-life of 12.3 years. If a sample of 3 g of H-3 is produced, what will be the…

A: The radioactive decay of a substance is a first-order reaction. During this process, a heavy metal…

Q: (6) After three half-lives, 100% (A) (B) 50% (C) 25% (D) 12.5% % of the initial isotope of a…

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Q: Calculate the mass of sodium-24 that will remain in a 20.0 g sample after 75 hours. Sodium has a…

A: Chemical kinetics is branch of chemistry in which we deal with the speed at which rate of reaction…

Q: Technetium-99m, an important radionuclide in medicine, has a half-life of 6.0 hours. What percentage…

A: Formula for radioactive decay is given as,

Q: Technetium-99m, an important radionuclide in medicine, has a half-life of 6.0 hours. What percentage…

A: Half life of technetium - 99 is = 6 hours.  Let Take a sample of technetium - 99 having number of…

Q: The half-life of P-33 is 25.3 days. How long will it take for 64 g of P-33 to deplete to 1.0 g? A.…

A: Given, Half life = 25.3days

Q: A 120-mg sample of technetium-99m is used for a diagnostic test. If technetium-99m has a half-life…

A: Rate of a reaction determines the speed with which a reaction proceeds. First order reaction is a…

Q: 1.) Carbon-14 has a half-life of 5600 years. If you had a sample of 100% carbon-14, how much would…

A: Given, carbon-14 half life with 100 % carbon-14 sample.we are asked to calculate the amount of…

Q: Iodine (131 I)  is used in diagnostic and therapeutic techniques in the treatment of thyroid…

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Q: You have a sample of Bismuth-212 to prepare for an upcoming medical test.  This isotope has a…

A: The radioactivity follows first-order kinetics. The half-life relates to the rate constant, k for…

Q: The beta decay of cesium-137 has a half-life of 30.0 years. How many years must pass to reduce a 25…

A: We have given that The beta decay of cesium-137 has a half-life of 30.0 years. How many years must…

Q: Tritium, which is , has a half-life of 12.3 years. Calculate the amount of time it would take for…

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Q: days. Suppose the initial amount of Thorium-234 is 192.9 mg, find the amount of Thorium-234 remains…

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Q: 90Sr is an isotope produced from atmospheric testing of nuclear bombs. If nuclear testing was…

A: Half  life = 28.5 years

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

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Q: 39. If the half-life of phosphorus-32 is 14.3 days, how much of a 200. mg sample of phosphorus-32…

A: Given data,  Half life of phosphorus-32 is 14.3 days  Total amount of Phosphorus-32 is 200 mg

Q: lodine-131 has a half-life of 8.1 days. How much of 2 g of the isotope will remain after 56.7 days?…

A: The nuclear half-life of a radioactive isotope tells you how much time must pass in order for half…

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…

Q: The half-life time of a radioactive element is 6.0 days. A sample of 50.0 g of this element is…

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Q: 19. The half-life of the radio-isotope iodine - 131 is 8 days. What fraction of the original iodine…

A: Half life of the reaction is the time in which the reactant becomes half of the initial reactant. It…

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: A rock had originally 4500 atoms of U-238 and no Pb-206. U-238 decays into Pb 206 with a half life…

A: The age of the rock has to be determined

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

A: Given half life = 8.04 days time = 12.7 days initial mass = 31.1 mg

Q: II 24 Iours, what is the half-life of Ra-226 in years? 27 3. Arsenic - 70 has a half life of 140…

A: As per our guidelines we can only solve first question. Please resubmit the other questions as next…

Q: radioactive sample originally contains 8.0g of an isotope with a half- life of 6 days. What is the…

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Q: A radioactive isotope decays from 60 grams to 15 grams in 20 seconds. What is its half-life? a) 20…

A: The radioactive decay is an example of first order reaction.

Q: If the half-life of a particle is 2 days, how much of this substance remains after 8 days? Select…

A: Since you have posted multiple questions, we are entitled to answer the first only. Given: Half-life…

Q: A 120-mg sample of technetium-99m is used for a diagnostic test. If technetium-99m has a half-life…

A: The basic formula for half life equations is A= amount remainingP= original amountt= elapsed…

Q: Technetium‑99m, an important radionuclide in medicine, has a half‑life of 6.0 hours. What percentage…

A: Using concept of half life time.

Q: A radioactive material decays at a rate proportional to its amount. If the material has a half-life…

A: To solve this question, first find out rate constant using half life and then use that to find out…

Q: At a given time, there are 1.2 mg of a radioactive substance present. After 6 hours there is only…

A: To solve this question, first find out the rate constant of radioactive substance and using that…

Q: The half-life of radiogold is approximately 3 days. If 1.5 g of this has been administered to a…

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Q: Carbon-14 has a radioactive half-life of about 6,000 years. If an organism has 10 g of carbon-14 in…

A: Provided half life (t1/2)=6000year Also, provided time(t)=6000year Initial amount (A•)=10g of…

Q: Substance Q initially weights 120% of its remaining mass after its decay in 60 minutes. What is its…

A: Given  substance Q initial weight =120% of its remaining mass after its decay for 60 mins t=60…

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: Iodine-131 has a half-life of 8.0 minutes. How many half-lives will pass in 120 minutes?

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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: A sample of radioactive radon-222 was found to have a half life of 3.823 days.  What fraction of…

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

Q: A sample of radioactive radon-222 was found to have a half-life of 3.823 days. What fraction of the…

A:

Q: Technetium-99m, an important radionuclide in medicine, has a half-life of 6.0 hours. What percentage…

A:

Q: A certain radioisotope has a half-life of 9.54 days. What percentage of an initial sample of this…

A:

Q: A 371.9 ng sample of an unknown radioactive substance was placed in storage and its mass measured…

A: On passing a half life the concentration of the substance becomes half. Let the substance has passed…

Q: The half-life of carbon-14 is about 5730 years. If an ancient leather strap is about 11,500 years…

A:

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

A: Given -  Half life of iodine = 61 days  Initial concentration of iodine (No) - 1 g After time t…