If you accidentally spill phosphorus-32 onto your shoe, how long would it take before 99.9% of the radioactive material has decayed so that you can safely wear the shoes again? (half life=14.26 days)

Q: Uranium-238, 238U, has a half-life of 4.51 x 109 years. How long will it take for 1.0 g of 238U to…

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Q: Cobalt-60 has a half-life of 5.27 years and is used in cancer treatment. If a patient ingests 20.0 g…

A: Since the decay reactions are first order reactions hence the relationship between the time and mass…

Q: Strontium-90 is present in the fallout produced by nuclear weapons testing in the atmosphere. Sr-90…

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Q: Radioactive calcium-47 decays with a half-life of 4.5 days. A chemist obtains a fresh sample of…

A: Half life of sample T = 4.5 days Final radioactivity A' = (100-25) % of A = 75 % of A.  A is initial…

Q: ou start with 2.00 moles of radioactive element with a half-life of 146 days. How many days until…

A: All decay reactions follow first-order kinetics.The initial number of moles of the element = 2.00…

Q: lodine-131 is used in the treatment of tumors in the thyroid gland. Its half-life is 8.1 days.…

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Q: A radioactive element has a half-life of 1.1 hours. How many hours will it take for the number of…

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Q: 24 g of an unknown radioactive substance decays to 1.5 g after 180 seconds. What is the half-life of…

A: To solve this problem we will use the first order chemical kinetics half life equation .

Q: Radioactive iodine (Iodine-131) has a half-life of 8.04 days. How long will it take for 150g of…

A: Given: The half-life of Iodine-131, t12 = 8.04 days. The initial amount of Iodine-131, (N0) = 150 g.…

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: The half-life of the radioactive isotope polonium-214 is 1.64x104 seconds. How long will it take for…

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Q: Another form of radiometric dating is potassium-argon dating, which tracks the ratio of Ar-40 to…

A: Any reaction following "first-order reaction", that reactions rate always relies over single…

Q: The isotope strontium-90 is produced during testing of nuclear weapons.  If 100.0 mg of strontium-90…

A: Given  Initial Amount of Sr - 90  (A)o = 100 mg  Half life time ( t1/2 )  =  29 years  Time ( t ) =…

Q: Iron-59 is used to study iron metabolism in the spleen. Its half-life is 44 days. How many days…

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Q: Radon, one of the noble gases, is a decay product of uranium and is itself radioactive, with a…

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Q: How long does it take for 78% of a sample of cobalt-60 to decay (the half-life is 5.26 years)?

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

Q: Barium – 122 has a half-life of 2 minutes. Suppose you obtain a sample weighing 10.0 g and it takes…

A: M final = final mass of the compound,M initial = Initial mass of the compound,t = time

Q: The half-life of protactinium-234 is 6.69 hours. What fraction of a given amount remains after 26.76…

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Q: How many grams will be left after 100 days if you have 150 g of thorium-234 at the beginning?…

A: Given,  The mass in grams will be left after 100 days of the decay, if initial amount of Th-234 is…

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

A: Given,Half life of phosphorus-32 = 14.3 daysInitial amount of phosphorus-32 = 33.8 mgTime taken for…

Q: what is the half-life of plutonium-239 if it takes 14 098 years for 33% of a given sample to decay

A: Radioactive decay follows the first-order kinetics. According to the first-order kinetics, the decay…

Q: what fraction of k-38 remains after 2.00 hours? the half-life of k-38 is 7.71 minutes

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Q: Radioisotope X has a half-life of 4.0 h. Based on the figure below, if the original sample of the…

A: Given,(i) initial amount of radio isotope X = 16.00 gHalf-life = 4.0 hTime taken for decay = 12.0…

Q: A 50.0 mg sample of an unknown radioactive substance was placed in storage and its mass measured…

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Q: Iron‑59 is used to study iron metabolism in the spleen. Its half‑life is 44 days.44 days. How many…

A: The time will take a 28.0 g28.0 g sample of iron‑59 to decay to 1.75 g has to be calculated

Q: Radioactive iodine-131 decays with a half-life of 8.0 days. A chemist obtains a fresh sample of…

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Q: 10. The half-life of tritium (hydrogen-3) is 12.3 years. If 48.0 milligrams of tritium is released…

A: 10. Given,Half-life of tritium Hydrogen-3 = 12.3 yearsTritium released from a nuclear power plant…

Q: The radioactive isotope Pu-238, used in pacemakers, has a half-life of 87.7 years. If 1.6 milligrams…

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Q: Carbon-11 is a radioactive isotope of carbon. Its half-life is 20.3 minutes. What fraction of the…

A: When the rate of the reaction is directly proportional to the first power of the concentration of…

Q: Strontium-90 is one of the products of the fission of uranium-235. This isotope of strontium is…

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Q: How much time is required for 84% of the isotope to decay?

A: Given: Iodine-131, which is used to treat thyroid cancer, has a half-life of 8.04 days. The…

Q: Radioactive phosphorus-32 decays with a half-life of 14.0 days. A chemist obtains a fresh sample of…

A: We have to calculate the number of days chemist have to do the experiment.

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: 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

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.