< Question 11 of 15 > The half-life of radioactive chromium-51 is 28 days, If a sample of chromium-51 has a mass of 12.0 pug, calculate the number of days it will take for the mass to be reduced to 0.750 ug. time: days

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 bismuth-210, 210Bi, is 5 days.(a) If a sample has a mass of 200 mg, find the amount…

A: Solution-  (a)-The half life periods of Bismuth-210 is 5days.the rate of decay of any substance…

Q: the half life of oxygen-15 is 2 minutes. what fraction of a sample of O-15 will remain after 5…

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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: 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: The half-life of Phosphorus-32 is 14.3 days. If you start with 100 grams of it, how long will it…

A: Half life of a first order reaction is given by , t1/2=0.693k Write the expression for first order…

Q: Cesium-137 is part of the nuclear waste produced by uranium-235 fission. The half-life of cesium-137…

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Q: Carbon-14 has a half life of 5730 years. How much carbon-14 would remain after 34380 years if the…

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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: A sample of polonium-210 has a half-life of 138 days a)What fraction of polonium-210 remains after…

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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: 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: Strontium-90 is radioactive and has a half life of 28.8 years. What percentage of a sample would be…

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Q: The half-life of selenium-83 is 22.3 min. If a sample contains 24.0g of selenium-83, how long will…

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Q: The answer should be 26.7 days

A: Half-life:The time taken for half disintegration of radioactive element from its original amount is…

Q: Technetium-99m, an important radionuclide in medicine, has a half-life of 6.0 hours. What percentage…

A: Half life of technetium - 99 is = 6 hours.  Let Take a sample of technetium - 99 having number of…

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

A: Given,

Q: The half-life of radium-226 is 1600 years. How long will it take for 10.0 mg of radium-226 to decay…

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Q: The half-life of mercury-203 is 46.6 days. What percentage of mercury-203 remains in a sample after…

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Q: A 120-mg sample of technetium-99m is used for a diagnostic test. If technetium-99m has a half-life…

A: Rate of a reaction determines the speed with which a reaction proceeds. First order reaction is a…

Q: Iodine-131 has a half-life of 8 days. What fraction of the original sample would remain at the end…

A: Half life is the period at which concentration of reactant reduces half of its original value.

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

A: Given -&gt; Half life = 3.82 days

Q: 7. If uranium-238 has a half-life of 45 billion years, how many years would it take for a 10-gram…

A: The half-life is the time required to reduce one half of the initial concentration of the substance.

Q: A 40.0 mg sample of a radioactive substance decays to 10.0 mg in 10 days. What is the half-life of…

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Q: Radium-223 has a half-life of 11.43 days. How long will it take for 80% of a sample of the said…

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Q: If half-life of carbon-14 is 5730 years, estimate the age of a bone containing 75% of its original…

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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: 2. The radioactive potassium-40 isotope decays to argon-40 with a half-life of. a. Write a balanced…

A: t1/2 = 1.2 x 109 year Initial Mass of K = 100 g Remaining Mass = 18 g

Q: The half-life of 51Cr is 2.78×101 day. Calculate how much time it would take for an isolated…

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Q: Cobalt-60 is a beta-emitter used in radiation cancer treatment equipment in hospitals. What total…

A: Given Initial mass = 24 g half life = 5.33 years time = 16 years

Q: II 24 Iours, what is the half-life of Ra-226 in years? 27 3. Arsenic - 70 has a half life of 140…

A: As per our guidelines we can only solve first question. Please resubmit the other questions as next…

Q: Californium-244 has a half-life of 19.4 minutes. If a researcher has 3.50 mg of Californium-244, how…

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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 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: A 120-mg sample of technetium-99m is used for a diagnostic test. If technetium-99m has a half-life…

A: The basic formula for half life equations is A= amount remainingP= original amountt= elapsed…

Q: percentage of his original carbon-14

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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: How many days would it take for a 1.0 milligram sample to reach this level if the half-life…

A: Since the decay reactions are first order  hence we can say 2 things about them  1) half life =…

Q: 21. Half-Life The half-life of radium-226 is approximately 1620 years. a. How much of a sample…

A: Introduction: We know that this decay of radioactive elements is a type of first-order reaction. The…

Q: What is the half-life of chromium-56 if 12.8 minutes are required for the activity of a sample of…

A: Radioactive decay follow first order kinectics . Half life for first order reaction  = 0.693/k  k is…

Q: A rock contains a Pb-206 to U-238 mass ratio of 0.473:1.00. Assuming the rock did not contain any…

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Q: Technetium-99m, an important radionuclide in medicine, has a half-life of 6.0 hours. What percentage…

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Q: decay

A: T1/2 = 28 yrs N = 0.40 g No = ? at T = 56 years

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: Given the half-life of Carbon-14 is 5770 years, how much of a 540 gram sample is left after 10000…

A: For the given radioactive decay process: Rate constant, k =?  Half-life=5770 years According to…

Q: Radium has a half-life of 1600 years. How many years does it take for 90% of a given amount of…

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Q: The half-life of radon-222 is 3.8 days. How much of a 100 gram sample is left after 15.2 days?

A: Half life is the time taken by the original compound to reduce to it's half.

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: 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…

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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.