Cesium-137, which has a half-life of 30.2 yr, is a componentof the radioactive waste from nuclear power plants. If theactivity due to cesium-137 in a sample of radioactive waste hasdecreased to 35.2% of its initial value, how old is the sample?(a) 1.04 yr (b) 15.4 yr (c) 31.5 yr (d) 45.5 yr (e) 156 yr

Q: A piece of a spear handle is found in an archaeological dig in Central America. It contains 42.1% as…

A: Given: Amount of isotope in handle = 42.1 % of a living tree. And the half-life of the isotope…

Q: Which of the following describe(s) the following reaction? Choose all that apply. N + He %0 + H 17 O…

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Q: In one of the neutron-induced fission reactions of U-235 (atomicmass = 235.043922 amu), the products…

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Q: The nuclide 241Am is used in smoke detectors. As it decays (with a half-life of 458 years), the…

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Q: Technetium-99m (Tc-99m) is used extensively in diagnostic applications, including PET scans. The…

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

Q: You take a course in archaeology that includes field work. An ancient wooden totem pole is excavated…

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Q: 15. A mammoth skeleton has a carbon-14 decay rate of 0.48 disintegrations per minute per gram (0.48…

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Q: 8. Patients with Graves disease have an overactive thyroid gland, and are commonly treated with…

A: Given the half-life of I-131, t1/2 = 8.0 days Initial activity, Ao = 9.9 mCi

Q: A 1.00-gram sample cantains two radioactive isotopes A and B. The half-life of isotope A is 2 hrs.…

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Q: 31. Uranlum 235 decays to Lead 207 with a half-life of 0.7 billion years. What Is age of a rock…

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Q: The initial amount of the radioactive material V in a rock is determined to be 6.78 mg. Only 1.46 mg…

A: final answer is = 5.3200 mg

Q: Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 × 1010 years. What is the…

A: Radioactive decay reactions follow first order kinetics.

Q: The half-live of americium-241 is 432 y. If 0.0002 g of americium-241 is present in a smoke detector…

A: Given: Mass of isotope = 0.0002 g. Half-life of isotope = 432 yr.

Q: How many radioactive disintegrations occur per minute ina 0.0010-g sample of 209Po that has been…

A: We know, k=ln2t1/2k - decay constant and t1/2 is half life

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Q: (Q111) In the next step of the neptunium-237 decay series, very unstable francium-221 is produced.…

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Q: There are initially 10 mCi of 19Os which undergoes B- decay with a half-life of 15.4 d into 191mir.…

A: Hii there, As there are multiple sub parts posted. we are answering first-three sub parts . If you…

Q: 1. This question is about nuclear chemisty. a) What is the age of a mummy, given a 14C activity of…

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Q: You are asked to prepare a sample of iodine‑131 for a radiation treatment. Its half‑life is 8.0197…

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Q: A piece of a spear handle is found in an archaeological dig in Central America. It contains 41.7% as…

A: Given, half life of C14 = 5730 yr

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

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Q: 2. Gold-198 has a half- life of 269 days. What is the activity (in curies) o a 0.43 mg sample?

A: Activity is depends on the number of atom present

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Q: Phosphorus-32 is a radioactive isotope with a half-life of 14.3 d (d = days). A biochemist has a…

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Q: You take a course in archaeology that includes field work. An ancient wooden totem pole is excavated…

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Q: The radioactive nuclide 60Co as a half-life of 5.27 years. Calculate the mass (in g) of "Co that…

A: Formula: N=Noe-λt

Q: Phosphorus-32 is a radioactive isotope with a half-life of 14.3 d (d = days). A biochemist has a…

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Q: Bromine-88 is radioactive and has a half life of 16.3 seconds. What percentage of a sample would be…

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Q: The initial amount of the radioactive material V in a rock is determined t be 6.78 mg. Only 1.46 mg…

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Q: Carbon-14 has a half-life of 5730 yr. A living organism has an activity of 15.2 counts per minute…

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Q: If 2.8X10⁻¹⁰ % of the atoms of a radioactive isotope disin-tegrate in 1.0 yr, what is the decay…

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Q: How many milligrams remain of a 15.0 mg sam- ple of radium-226 after 6396 years? The half-life of…

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Q: Iodine-131 is an important radioisotope of iodine that has a radioactive decay half-life and is…

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Q: An 80-mg sample of technetium-99m is used for a diagnostic test. If Tc-99m has a half-life of 6.0…

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

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Q: 32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 48.9 g of "P, how…

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Q: An artifact classified as bone, found in a site at Paviland Cave, Wales, is found to have a ¹4C…

A: Given that -  Initial activity , [A]0 = 0.255 counts per second per gram Carbon  Final activity, [A]…

Q: Which of the following poses a greater health hazard: a radioactive isotope with a short half-life…

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Q: lement X decays radioactively with a half life of 8 minutes. If there are 530 grams of lement X, how…

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Q: A rock started with 4000 atoms of a parent radioactive isotope and now has 3750 daughter isotopes.…

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Q: Iodine-125 emits gamma rays when it decays time Tellurium-125 and has a half-line of 60 days. If a…

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Q: Some watch dials are coated with a phosphor, like ZnS,and a polymer in which some of the 1H atoms…

A: Given that : Half life of tritium = 12.3 yr Time period (t) = 50 yr Mass of tritium = 3.024 g

Q: Carbon-14 has a half-life of 5730 yr. A living organism has an activity of 15.2 counts per minute…

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Q: A moon rock collected by a U.S. Apollo mission is estimated to be 4.10 billion years old by…

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