Fluorine-21 has a half life of approximately 5 seconds. What percent of the original nuclei would remain after 1 minute?

Q: The half-life of strontium-90 is 28.0 years. How many grams of this nuclide in a 4.60-g sample will…

A: Half-life time t12=0.696k;   k is decay constantandt=1kln(m0m)m0 is mass of at time t=0m is mass of…

Q: The half-life of 26?? 59 is 44.6 days. How long will it take for 95.0% of a sample of this nuclide…

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Q: It takes 4 h 39 min for a 2.00-mg sample of radium-230 to decay to 0.25 mg. What is the half-life of…

A: Half life of first order kinetic reaction is given by:

Q: How long does it take for a radioactive substance to decay from 360 cps to 11.25 cps if the…

A: Half-life is the time required for the reaction to be half completed. It is denoted by t1/2 . For a…

Q: 1. A substance has a mass of 5 grams after decaying for 100 minutes. What was the mass of the…

A: Given that: Mass of substance left after decaying = 5 g Total time for decaying of substance = 100…

Q: One of the nuclides in spent nuclear fuel is UU-235, an alpha emitter with a half-life of 703…

A: Given , half life of U-235 = 703 million years. We need to find the time at which the amount of…

Q: Barium-142 is an beta emitter with a half-life of 11.0 min. If we start with 2.500 g of 142Ba, what…

A: The number of half-lives (n) can be calculated as

Q: The half-life of radioactive chromium-51 is 28 days, If a sample of chromium-51 has a mass of 12.0…

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Q: 137 Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A:

Q: Technicium-104 has a half-life of 18 minutes.If the initial mass is 100.0g,how much remains after 90…

A:

Q: If uranium-238 has a half-life of 45 billion years, how many years would it take for a 10-gram…

A: Given  Half life of U-238 (t1/2)   = 45 billion years 1 billion years    = 109 years  45 billion…

Q: A piece of literature has announced that Uranium 238( 23822U) has a binding energy of approximately…

A: We can theoretically calculate the mass of a neutron. But this will be different from the…

Q: 187 Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A: Given datas –  t1/2 = 30.2 years  t = ?  [A0] = 100.0 g  [At] = 1.20 g

Q: The half-life of Radium-226 is 1600 years. If 30 grams are left after 8,030 years, how many grams…

A: Radioactive decay follows first order kinetics.  k = 0.693/t0.5  Or, k = 0.693/1600 year^-1 =…

Q: After 52 hours of decay, only 0.06m of Cu-64 remains from the original sample of 1g. What is the…

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Q: Iodine 1 31 has a half life of about 8 days.  In 40 days what percent of the original sample would…

A: Formula used :-  t1/2 = .693/k  Where k is rate constant. k = 2.303/t log [A0]/[A]

Q: The half life of Radium-226 is 1590 years. If a sample contains 500 mg, how many mg will remain…

A: given :-  initial amount of sample = 500 mg  half life = 1590 years  To calculate :-  amount of…

Q: 187 Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A: Half-life of Cs is 30.2 years. Intial amount sample = 100 g  Final amount sample = 1.00 g

Q: 3) 120g of Chromium-48 decays. After 6 half-lives, how much of the original nuclei would remain?

A: Given,  Initial amount of Chromium - 48 is 120g. After 6 half lives the original nuclei would remain…

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 4.5 g remain. What is the original…

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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: Iodine-131 has a half-life of 8.0 days. How long will it take 10 μg of 131I to decrease to 1/100 of…

A: We have given the half life of 131I that is t1/2 = 8 days from this we can find the out the decay…

Q: The radioactive nuclide P# has a half-life of 14.3 days. How long would a waste containing 10 mg/L…

A: Answer: Radioactive reactions are first order reactions, therefore integrated rate law of first…

Q: Radium-221 has a half life of 30 seconds. How long will it take for 82% of a sample to decay?

A: Half life =30 seconds Decay percentage = 80%

Q: Can the half-life of a given isotope be manipulated or changed to suit human needs?

A: Answer

Q: Fluorine-21 has a half of approximately 5 seconds. What fraction of the original nuclei would remain…

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Q: Tc-99 is often used in medicine and has a half-life of about 6 hours. if a patient is given 30.0…

A: First of all you need to find the radioactive decay constant of this nuclei. Which is nothing but -…

Q: Bismuth-209 has a half-life of 2.01 x 1019 years.  How long will it take for 6.92 kg of bismuth-209…

A: We have to predict the time taken.

Q: The half-life of a radioactive isotope is 12.8 seconds. Starting with 0.960 g of this isotope, how…

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Q: The half-life of thorium-227 is 18.72 days. How many days are required for three-fourths of a given…

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Q: 187 Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A:

Q: isotope with a half-life of about 22 minutes. How much time will it take for a sample of Fr-223 to…

A: Radioactivity follows first order kinetics,  Half life time (t1/2) = 22 minutes  k = 0.693/t1/2 =…

Q: The half-life of copper-67 is 61 hours.  If an original sample contains 24 grams how many grams are…

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Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 5.2 g remain. What is the original…

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Q: The half life of iodine-125 is 60 days. What fraction of iodine-125 nuclides would be left after 360…

A: As per guidelines if multiple questions posted , first question is allowed to answer , please post…

Q: The half-life of radium 226 is 1602 years. If you have 500 grams of radium today how many grams…

A: This is a first order reaction where the radioactive substance disintegrates. The half life time of…

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

A: Half life of Kr-85 = 10 yr % of Kr remain active = ?

Q: Nuclides with too many neutrons to be in the band of stability are most likely to decay by what…

A: Nuclides with too many neutrons lie above in the band of stability. This nuclie which has more…

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: The isotope cesium-137 has a half-life of 29.75 years. How long will it take a 100 gram sample of…

A: Radioactive decay reactions are first order reactions. The calculation can be done using first order…

Q: One of the nuclides in spent nuclear fuel is U-235, an alpha emitter with a half-life of 703 million…

A: Using the given half-life period, rate constant, k can be determined.

Q: 137 Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A:

Q: A sample of F-18 has an initial decay rate of 1.5 × 10^5/s. How long will it take for the decay rate…

A: Radioactive decay is a first-order decay process.Given, half-life of F-18, t1/2 = 1.83 hours.Initial…

Q: A radionuclide undergoes beta decay with half-life of 30.0 years. How many years will it take for 25…

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Q: After 103 days, only 2.3 g of a radioisotope remains from a sample that originally has 150 g of it.…

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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: A certain radioisotope has a half-life of 9.54 days. What percentage of an initial sample of this…

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Q: Zinc-62 decays with a half-life of 9.186 hours. 1. Write the balanced nuclear reaction of Zn-62 as…

A: As per the rules, only three sub-parts can be answered:

Q: Strontium-90 has a half life of 28 years. If a 5.31 mg sample was stored for 112 years, what mass of…

A: Reaction in which rate is linearly depend upon one reactant is known as first order reaction.

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

A:

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.