A sample of a radioactive metal starts with a mass of 400 grams. When a chemist examines it later, it has gone through 4 half-lives. How much metal remains? *

Q: Thorium-234 has a half-life of 24.1 days. Suppose the initial amount of Thorium-234 is 162.9 mg,…

A: All natural and artificial radioactive decays follows first order kinetics The integrated rate…

Q: Carbon-14 Original amount: 60.0 g Amount left: 3.75 g Total time: Half-life: 5730 y Number of…

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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 radioactive sample contains 1.55 g of an isotope with a halflife of 3.8 days. What mass of the…

A: Given details, t1/2 = 3.8 days t = 5.5 days m0 = 1.55 g To calculate the mass of the isotope. By…

Q: A radioactive sample has a half-life of 3.0 min. What fraction of the sample is left after 12 min? O…

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

A: 21. Given that: Half life of Barium-122 = 2 mins. Time taken for the set up = 10 mins

Q: Sulfur-38 Original amount: 5.0 g Amount left: c Total time: 8.61 h Half-life: 2.87 h Number of…

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Q: Tin-129 is radioactive and has a half life of 2.23 minutes. How long would it take a sample to decay…

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Q: Given that radioactive cobalt-60 has a radioactive constant equal to 3.8 x 10 determine its…

A: Now in order to calculate the half life we first write down the given data: Radioactive…

Q: How much (in grams) of a 17.2-g sample of some radioactive element (half-life of 4 days) remains…

A: The given mass of the substance =  17.2 g The half-life of the substance (t1/2) = 4 days Time…

Q: E1 and E2 are radioactive elements with half-lives of 10 days and 1 day respectively. If you will be…

A: As E1 has half life of one day and E2 of 10 days so E1 will reduced to its half amount in 1 day…

Q: Gold-198 has a half-life of 2.7 days. How much of a 488.6 mg gold-198 sample will remain after 13.5…

A: We have half life as 2.7 days, we have initial amount as 488.6 mg, we have to calculate the sample…

Q: The half-life of Po-218 is 3.1 minutes. How many grams of Po-218 would be left after 9.3 minutes, if…

A: M

Q: After 60 days, 10 grams of radioactive isotope remains from an original 27 g sample. What is the…

A: Given,

Q: If 10 grams of Uranium underwent three half-lives; how much uranium would be left?

A: The time in which half of the initial amount of the reactants convert into the product known as half…

Q: How much of a 0.15 g sample of U-238 after the passage of 3200 years? Half life is 4.01×10⁹ years.

A: Given: Mass of sample = 0.15g Duration of decay= 3200 years. Half life= 4.01×109 years To find: The…

Q: If you are given a sample of 14 g of a radioactive substance and waited for 4 half-lives to pass,…

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Q: Krypton-85 has a half life of 10 years. Approximately what percentage of Kr-85 produced from the…

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Q: Potassium 40 has a half life of 1.3 billion years.  If no half lives had passed, what percentage of…

A: A numerical problem based on half life period, which is to be accomplished.

Q: Look at the figure below. In the mineral specimen represented here, radioactive parent atoms (red)…

A: HALF- LIFE PERIOD: In radioactivity, half- life period is defined as the time period required for a…

Q: A radioactive substance has a ​half-life of 437 years. What is its decay​ rate?

A: Radioactive Decay: Radioactive decay is the property of the several naturally occurring elements as…

Q: A radioactive element decays at such a rate that after 15 minutes, only 1/10 of the original armount…

A: We will iae intergrated rate equations for first order kinetics to solve this question.

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

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Q: A solution of sodium iodine containing the radioactive isotope Iodine-131 was given to a patient. If…

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Q: 27. A radioactive substance weighs 30.0 grams and has a half-life of 2,460 years. How much will…

A: As  we know that all radioactive reactions are first order reaction. Given in the question, Mass of…

Q: Lead-204 has a half-life of 15 minutes. Suppose there are initially 100 Pb-204 atoms. After 30…

A: The time in which half of the initial amount of the reactants convert into the product known as half…

Q: A 169 ng sample of radioactive material has a half life of 3.9 days. How many ng of radioactive…

A: Sample of redioactive material=169ng Half life=3.9days

Q: How does half-life relate to radioactive decay?

A: The half-life (t1/2) is the time required by any quantity to reduce half of its initial value.

Q: Indium-116 is radioactive and has a half life of 14.10 seconds.

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Q: After 60 days, 10 grams of radioactive isotope remains from an original 80 g sample. What is the…

A: Law of radioactive decay: Law of radioactive decay relates the amount radioactive substance…

Q: 145 g sample of radioactive has a half live of 6.4 days how many g of material is left are 2 half…

A: The time required to disintegrate the molecule to half of its initial concentration is called the…

Q: 233ра 'Pa

A: Radioactive decay series: It is series of radiochemistry in which transformation of one radioactive…

Q: Iodine-131 has a half-life of 8.0 minutes. How many half-lives will pass in 120 minutes?

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

A:

Q: If there were 300 grams of carbon-14 originally present, how many years would it take for there to…

A: Interpretation -  To determine how many years would it take for there to be 90 grams of carbon-14…

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: Phosphorus-32 has a half-life of 14.0 days. Starting with 4.00g of P, how many grams will remain…

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Q: 12. A year ago there were 4 grams of a radioactive substance. Now there are 3 grams. How much was…

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Q: After 60 days, 10 grams of radioactive isotope remains from an original 38 g sample. What is the…

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Q: A solution of sodium iodine containing the radioactive isotope lodine-131 was given to a patient. If…

A: These radioactive decay reactions are the first order reactions . In these type of reactions , rate…

Q: Polonium 209 (Po-209) has a half life of 103 years. How long would it take a 100-g sample to decay…

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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: A radioactive sample has a mass of 500 grams. How much remains after two half-lives?

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Q: A radioactive iodine sample has a half life of 6 days. If the original sample is 24 grams, how much…

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Q: 1. Gold-191 has a half life of 12.4 hours. What mass of this isotope would remain after 49.6 hours…

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

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Q: Polonium-210 is a radioactive substance with a half-life of 138 days. If a nuclear facility is…

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