Enter your answer in the provided box. A rock sample originally contains 4.79 mg of 238U. How much 206pb will be in the rock sample when it is 1.4 × 108 years old? The half-life of uranium-238 is 4.51 × 109 years.

Q: If the amount of a radioactive element decreases from 0.36 g to 90. mg in 22 min, what is its…

A: Half-life (t1/2) is defined as the time required by a substance to reduce to half of its initial…

Q: The half-life of 234U, uranium-234, is 2.52 105 yr. If 98.9% of the uranium in the original sample…

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Q: A pure sample of tritium, 3H, was prepared and sealed in a container for a number of years. Tritium…

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Q: If the amount of a radioactive element decreases from 2.4 g to 0.30 g in 12 days, what is its…

A: Given: Initial amount of radioactive element, N∘=2.4gFinal amount of radioactive element, N =…

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: 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: Enter your answer in the provided box. A rock sample originally contains 3.20 mg of 238U. How much…

A: Given data  Initial amount of 238U : No= 3.20 mg final amount of 238U : N = ? mg half life  : t1/2 =…

Q: A rock constains Pb-206 to U-238 mass ratio of 0.245: 1.00. Assuming the rock did not contain any…

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Q: Enter your answer in the provided box. A rock sample originally contains 3.32 mg of 43°U. How much…

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Q: The half-life of Po-218 is 3.05 minutes. How many minutes does it take for a sample of Po-218 to…

A: Given: Half-life of Po-218 = 3.05 minutes. And the final amount of Po-218 isotope remaining = 2.35 %…

Q: A rock found in the Australian Outback contains 438 g of Pb-206 for every 1.00 g of U-238. How old…

A: The objective of the question is to determine the age of a rock based on the ratio of Pb-206 to…

Q: The radioactive nuclide 9Co has a half-life of 5.27 years. Calculate the mass of 2Co that remains…

A: We have to calculate the amount remaining after 1 year.

Q: the Cs-131 by life has a half life of 30 years. after 120 years, 2.6 g remain. what is the original…

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Q: A moon rock collected by a U.S. Apollo mission is estimated to be 3.50 billion years old by…

A: Given , Age of sample collected from moon t= 3.5 billion year =3.5×109 year

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

A: Here we are required to find the amount of Francium 221 remain after 7.32 minutes.

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

A: Calculate the value of rate constant (k):

Q: A nuclear powerplant immediately emits 48.01 g of tritium, given its half life of 12.3 yrs.…

A: All natural and artificial radioactive decays follows first order kinetics. The half life of first…

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: half-life of 4.536 days

A: Given data are as follows: Calcium-47 half-life = 4.536 days Initial weight of Calcium-47 = 250g

Q: A laboratory investigation shows that a sample of uranium ore contains 5.37 mg of 238/92 U and 2.52…

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Q: The half-life of radon-222 is 3.82 days. If you begin with 36.7 mg of this isotope, what mass…

A: Half life of radon-222 (t1/2) = 3.82 daysInitially mass of radon-222 = (Rn)0 = 36.7 mgmass of…

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 3.50 billion years old by…

A: Given : Time = 3.50 billion years old. Mass of uranium-238 = 1.540g Half life = 4.47 x 109 years

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 4.30 billion years old by…

A: Given: Age of rock = 4.30 billion years = 4.30 X 109 years Final mass of 238U remaining = 1.325 g…

Q: Enter your answer in the provided box. A rock sample originally contains 3.21 mg of 238U. How much…

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Q: 65 grams of a radioactive sample with a half-life of 6,000 years is allowed to decay for 75,000…

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Q: A rock contains a Pb-206 to U- 238 mass ratio of 0.262: 1.00. Assuming that the rock did not contain…

A: The answer to the following question is-

Q: In a 3 X 109 -year-old rock that originally contained some 238U , which has a half-life of 4.5 X 109…

A: Half-life is defined as the time in which the original numbers of nuclei are decayed to half. In the…

Q: 1) The half-life of 238U is 4.5 billion years. How long would it take for 1.0 g of this radioactive…

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Q: Tritium 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: Given: Amount of tritium taken originally=3g Half life=12.3 years Total time taken=24.6 years Mass…

Q: a) Mrs. Price's son, Liam is currently working as a boilermaker at the Darlington Nuclear Power…

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Q: The radioactive nuclide ⁶⁰₂₇ Co has a half-life of 5.27 years. Calculate the mass of ⁶⁰₂₇Co that…

A: Given,

Q: Next step of the neptunium-237 decay series, very unstable francium-221 is produced. The half-life…

A: Given: Half-life of  francium-221 = 5.00 minutes Initial mass of francium-221 = 6.12 grams Time…

Q: In a 3×109 -year-old rock that originally contained some 238U , which has a half-life of 4.5×109…

A: Since 238U has a half-life of 4.5 × 109 y, it is useful for dating only very old materials, showing,…

Q: How many alpha particles are emitted per minute by a 0.0010-g sample of 238U that has been freshly…

A: Given, Mass of sample = .001 g Half life of uranium = 4.47 x 109 years = 4.47 x 109 x 3.156 x 107…

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

A: Concept:  Radioactive decay: It is the process by which an unstable atomic nucleus loses energy by…

Q: Thorium-227 has a half-life of approximately 19 days. What percentage of an original amount of…

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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.