Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222 is 3.82 days. If you begin with 33.5 mg of this isotope, what mass remains after 7.30 days have passed? mg

Q: The half-life of Lithium-8 (Li-8) is 0.84 seconds. If 400 grams of Li-8 were released to the…

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Q: If you have 1 gm of pure potassium 40 (40K) that is experimentally determined to emit about 105 beta…

A: Activity of 40 K = 105 beta rays. The decay constant λ can be calculated as follows:

Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A: To solve this problem first we find the rate constant ( k) using half life time . Then we will…

Q: Thallium-201 is used medically to diagnose heart problems. The half-life of thallium-201 is 72.9…

A: Since the decay reactions are first order reaction. Hence for the first order reactions we can say…

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

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Q: 25. Iodine-131 is a radioactive substance that can be used to treat certain thyroid conditions. It…

A: Q25) Given that: Half life = 8 days Mass of Iodine = 40 mg Remain after 4 half lives = ?

Q: Technicium-104 has a half-life of 18 minutes.If the initial mass is 100.0g,how much remains after 90…

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Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. If…

A: ★ Answer : 13.712 mg of Gallium-67 remains after 112 hours. ★ Solution :

Q: A sample of Thorium-228 has a half life of 1.9116 years. what percent of thorium 228 remains after…

A: Let the initial amount be A0After the first half-life the amount remaining is

Q: If you start with 71.0 grams of a radioactive substance with a half life of 3 days, how much will be…

A: Here given, Initial amount (N0) = 71 grams Half life (t1/2) = 3 days Time (t) = 15 days Amount left…

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. If…

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Q: gold -198 is used in the diagnosis of liver problems. the half-life of 198au is 2.69 days. if you…

A: Calculating the rate constant for first order reaction using half-life: t1/2=0.693k     .....(1)…

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

A: Given is the radioactive isotope.We know any radioactive decay follows first order  reaction…

Q: Gallium-67 is used medically in tumor- seeking agents. The half-life of gallium- 67 is 78.2 hours.…

A:

Q: The half-life of 129I is 1.72 x 107 years. Consider a sample that contains 2.39 x 106 atoms of this…

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Q: The radioisotope radon-222 has a Half-Life of 3.8 days. How much of a 73.9-g sample of radon-222…

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Q: Iodine 1 31 has a half life of about 8 days.  In 40 days what percent of the original sample would…

A: Formula used :-  t1/2 = .693/k  Where k is rate constant. k = 2.303/t log [A0]/[A]

Q: Radioactive nuclide, 90Sr, has a half-life of 30 years. What percent of a sample of 90Sr will remain…

A: Half life = 30 years  Time given = 60 years

Q: A scientist obtains 64 grams of a radioactive isotope.  The isotope has a half-life of 3.2 days.…

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Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. If…

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Q: A radioactive isotope has a half-life of 12.0 seconds. How much of a 100 gram sample is left after…

A: Given  Initial Mass of Sample ( A)0  = 100 gram  Half life time ( t1/2)   = 12 sec  Time ( t ) = 36…

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. If…

A:

Q: The half-life of tritium is 12.3 years. If 48.0 mg of tritium is released from a nuclear power plant…

A: Given data contains, Half-life of tritium is 12.3 years Mass of tritium is 48.0 g Time t is 5.0…

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

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Q: Americium-241 is a radioactive isotope that is used in smoke detectors. It has a half-life of 432.2…

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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…

Q: Radioactive nuclide, 90Sr, has a half-life of 30 years. What percent of a sample of 90Sr will remain…

A:

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: The radioactive nuclide Co has a half-life of 8.5 hours. What mass of Co remains from a 0.0196 g…

A: Half life = 8.5hrs  Mass = 0.0196g  t = 18hrs

Q: Thallium-201 is used medically to diagnose heart problems. The half-life of thallium-201 is 72.9…

A: Decay reactions are first order reactions. Since we know that, for different order of reactions, the…

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: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. If…

A: Gallium - 67 has a half-life of 78.2 hours. Initially 36.7 mg of Gallium - 67 were present.   Here,…

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

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Q: Plutonium-239 has a half life of 2.41x10* yr. If you have a 10.0 mg sample how much will remain…

A: The time where any substance/element gets remained just half of its actual quantity is considered as…

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

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Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A: The half life of radon = 3.82 days. Initial amount = 37.9 mg  time = 4.70 days mass remains after…

Q: 3. Suppose a sample of carbon-243 has a half-life of 3427 years. How long does it take for 80% of a…

A: In this question, we have to find out the correct answer of given problem by the help of the…

Q: Technetium-99 which has a half life of 6 hours is a useful isotope in diagnostic tests. If a patient…

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Q: Cobalt-60, with a half-life of 5 years, is used in cancer radiation treatments. If a hospital…

A: Radio active decay of a radioactive nuclide undergo via first order kinetics

Q: The noble gas radon has been the focus of much attention because it may be found in homes. Radon-222…

A: Write the balanced equation of Rn-222 on alpha decay ?

Q: Technetium-99 which has a half life of 6 hours is a useful isotope in diagnostic tests. If a patient…

A:

Q: Iron-59 has a physical half-life of 45 days. If 96 g of a radioactive iron sample (59Fe) is received…

A:

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. If…

A: Here given, The half-life of gallium-67 (t1/2) = 78.2 hours Time (t) = 198 hours Initial amount (N0)…

Q: Thallium-201 is used medically to diagnose heart problems. The half-life of thallium- 201 is 72.9…

A:

Q: A sample of Thorium-228 has a half-life of 1.9116 years. What percent of Thorium-228 remains after…

A: Applying basic concept of radioactivity.

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…