If a rock contained 12.0 g of ⁴⁰K when the earth was formed 4.54 billion years ago and the half-life of ⁴⁰K is 1.25 billion years, what mass of ⁴⁰K remains, in grams, in the rock today?

Q: In the year 2005, a picture supposedly painted by a famous artist some time after 1475 but before…

A: This is a question based on radiocarbon dating. Here we will use first order reaction rate to…

Q: 29) a rock from the moon was found to contain 1.0 x 10* g (A,) of uranium-238 and 4.0 x 10“ g…

A: The half-life of a radioactive isotope (t1/2 ): All radioactive decay first-order reaction kinetics.…

Q: After 40.0 days, how much Ac-225 remains if the starting mass was 73.0 g? Ac-225 has a half life of…

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Q: You have a sample of unknown medication that is radioactive. You believe you should be able to…

A: Given: The initial activity, (A0) = 1.14×106 Bq. The activity after 11.1 hrs, (A) =  6.60×105 Bq.…

Q: If the half-life of a parent material is 10 Ma, and about 88% (rounded) has decayed to daughter…

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Q: Moonrock collected by a US Apollo mission is estimated to be 4.30 billion years old by uranium/ lead…

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Q: Uranium-235 decays to Lead-207 with a half life of about 704 million. years. if you find a 1000g…

A: Half life of Uranium-235t12 = 704 million years Initial amount of fossilNo= 1000 gms Final amount of…

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 3.70 billion years old by…

A: Since this is a first order decay The rate constant with half life is given by…

Q: Iron-59 has a half-life of 45 days. If 168 g of a radioactive iron (59Fe) is received in the lab…

A: We know radioactive decay is first order reaction so the half-life of a first-order reaction is-…

Q: The half-life of Polonium-218 is 3.00 minutes.  How many half-lives pass after 18.0 minutes ?  The…

A: Concept - Radioactive decays are first order reactions. So we use the formula, Nt = No(1/2)n, where…

Q: A small figure carved from wood, believed to predate the period of Roman occupation of the Middle…

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Q: Carbon -14 has a half-life of 5.730 x 10 3 years.  If the original mass of the parent is 501.695 g,…

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Q: a 45.91 mg sample of a pure radioisotope has a half-life of 52 days, what will be the mass of the…

A: Given 45.91 mg sample of a pure radioisotope has a half-life of 52 day mass of the original…

Q: At the beginning of an experiment, a scientist has 244 grams of radioactive goo. After 105 minutes,…

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Q: [References) A rock containing 8 mg of plutonium-239 per kg of rock is found in a glacier. The…

A: Radioactive decay, also known as radioactive disintegration, is when an unstable nucleus loses its…

Q: An unknown radioactive substance has a half-life of 3.20 hours. If  20.8 g of the substance is…

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Q: A radioactive sample contains 1.55 g of an isotope with ahalf-life of 3.8 days. What mass of the…

A: Radioactive isotopes may occur naturally or be artificially produced. Radioactive isotopes possess…

Q: While in the upper peninsula, you have found an unusual fossil in a rock layer that you are really…

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Q: 4. You find a skull in a nearby Native American ancient burial site and with the help of a…

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Q: A moon rock collected by a U.S. Apollo mission is estimated to be 3.70 billion years old by…

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Q: Enter your answer in the provided box. A rock sample originally contains 4.79 mg of 238U. How much…

A: The question belongs to Nuclear Chemistry. We need to find how much lead will be in the rock sample…

Q: An unknown radioactive substance is currently decaying. Initially, the sample contained 16.1g of the…

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Q: A 60 mg sample of a radioactive nuclide is administered to a patient to obtain an image of her…

A: Given: Half-life = 12 hours Radioactivity follows first-order kinetics. First calculate the rate…

Q: A bottle of wine, which was analyzed for its tritium (3H) content, was found to contain 12.30% of…

A: Given: The half-life of tritium (t1/2) = 12.3 years  Amount left of tritium = 12.3 ℅

Q: If the half-life of iodine-131 is 8.10 days, how long will it take a 50.00 g sample to decay to 6.25…

A: Given - Half life of iodine -131 =8.1 0 days  Initial weight of sample= 50.00 gram  Final weight of…

Q: Tc-99m is the most commonly used radioactive isotope in medicine. It is a gamma emitter and has a…

A: The half life of Tc-99 is six hours. There will be two half lives involved in twelve hours. The…

Q: A wooden object from an archeological site is subjected to radiocarbon dating. The activity due to…

A: To determine the age of the archaeological sample, we can use the formula for radioactive decay:

Q: An element Y was found by meteorologists inside a fossil and at present, there is 3.8g of it left.…

A: Given : initial amount = 30 g                Final amount = 3.8 g             Time taken = 45000…

Q: 0.132-g sample of Fe-29 (half-life is 44.5 days) is allowed to decay for 265 days. What quantity of…

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Q: 32p is a radioactive isotope with a half-life of 14.3 days. If you currently have 32.7 g of 32P, how…

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Q: In order to investigate the age of a mineral sample believed to be millions of years old, which…

A: Please find your solution below : Isotopes are defined as the members of family of same element that…

Q: 8. The isotope ¹72Ta undergoes radioactive decay. After 2 hr, 1/16 of the initial amount of 172 Ta…

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