If a rock sample was found to contain 4.65 x 10 mol of argon-40, how much potassium-40 would also have to be present for the 1.3x 10° years old? The half-life of K-40 is 1.3x 10° yeaks.

Q: How long will it take a radioactive sample of iodine-131 (half-life 8.07  d ) to lose 99.2  %  of…

A: The given disintegration reaction is first order reaction. Half life t1/2 = 0.693 / K 8.07 days =…

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: Radon-220 undergoes alpha decay with a half-life of 55.6 s. Assumethere are 16,000 atoms present…

A: We will be using the formula which related number of atoms  remaining after a given number of half…

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

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Q: Age of the Earth. Suppose that at the formation of the Earth there were equal amounts of 235U and…

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Q: Cobalt-60 has a half-life of 5.3 years. How many half-livesoccur after 21.2 years?

A: Generally, a radioactive decay reaction takes place as a first order reaction.  In a first order…

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

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Q: The half-life of tritium is 12.5 years. How much will remain after exactly 100 years if you start…

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Q: A freshly purified 2.00 g sample of the alpha particle emitting radionuclide 244 Am is prepared then…

A: Mass of radionuclide = 2.00 gVolume of evacuated container = 0.100 LTemperature = 25 °CPressure =…

Q: You are studying a sample of granite that is about 2.1 billion years old. You know it contains some…

A: Here granite containing uranium -235 is formed 2.1 billion years old. We have to determine the…

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

A: Given -> Half life = 3.82 days

Q: A rock contains 0.232 g of Pb-206 to every 1.00 g of U-238. Determine the age of this rock assuming…

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Q: PET scans require fluorine-18, which is produced in a cyclotron and decays with a half-life of 1.83…

A: Given: Half life, T1/2 = 1.83 hrVelocity of transport, v= 60.0 miles/hrfinal Concentration of F-18 =…

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: How old is a bottle of wine if the tritium ( 3H) content is 25% that of a new wine? The half-life of…

A: step1: Radioactive decay:-The emission of energy in the form of ionizing radiation is known as…

Q: rock contains 0.398 g of Pb-206 to every 1.00 g of U-238. Determine the age of this rock assuming…

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Q: Iodine-125 (125I) is used to treat, among other things, brain tumors and prostate cancer. It decays…

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Q: Radioactive Radon-222 gas (222Rn) occurs naturally as a product of uranium decay. The half-life of…

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

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Q: Cobalt-60 is commonly used as a source of beta-particles. How long does it take for 87.5 perxent of…

A: The decay reactions first order reactions. Since we know that the relationship between the amount of…

Q: 10. The 14C content of an ancient piece of wood was found to be one-sixteenth of that in living…

A: The question is based on the concept of carbon dating. We have been given the fraction of carbon…

Q: PET scans require fluorine-18, wich is produced in a cyclotron and decays with a half-life of 1.83…

A: Given data,Half life(t1/2)=1.83hoursSpeed=60.0miles/hrLet initial concentration of F-18 be 100Final…

Q: The half-life of cesium-137 is 30.2 yrs. If the initial mass of a sample is 1.00kg, how much will…

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Q: If a rock sample was found to contain 1.27 x 10-7 mol of argon-40, how much potassium-40 would also…

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

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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: A moon rock collected by a U.S. Apollo mission is estimated to be 4.20 billion years old by…

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Q: 187Pb has a half-life of 15.2 s.  If a sample of this isotope is initially 750.0 g, what mass of the…

A: The objective of this question is to find out the remaining mass of the Pb-187 isotope after 18.5…

Q: lodine-125 is a radioactive isotope commonly used in medicine. It has a half-life of 59.5 days. A…

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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…

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

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.