0.0736t wheret is in days. A particular compound decays according to the equation y = ae Find the half-life of this compound. a. about 9.1 days b. about 9.4 days c. about 6.8 days d. about 7.4 days

Q: Technetium-99m, a metastable state of technetium-99 commonly used in nuclear medicine, has a…

A:

Q: 19. The half-life of carbon-14 is 5730 years. A plant fell into a tar pit 18,400 years ago before…

A:

Q: The first-order decay of radon has a half-life of 3.823 days.  How many grams of radon remain after…

A: Ans

Q: a radioactive isotope of hydrogen, has a half-life of 12.4 years. Of an initial sample of 33 grams,…

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

Q: What is the half-life of I53131, in days, if its decay constant is 9.94×10−7s−1? Select the correct…

A: Decay reactions are first order reactions. Given : Decay constant = 9.94 X 10-7 s-1

Q: Half-life is the time required for a radioactive element to decay to half of its original mass.…

A: Given: The % of original radium sample=100% The % of a sample of radium that has decayed=75% The…

Q: [Refere A 1.14 g sample of a radioactive isotope decays to 0.87 g in 36.3 hr. What is the half-life…

A: Given  Initial Amount [ A ]0   = 1.15 gram  Remaining Amount [ A ]    = 0.87 gram  Time ( t ) = 36.3…

Q: Determine the half life of an isotope hat decays from 450.0g to 320.0g in 50 years.

A:

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

A: The maximum distance that the cyclotron can be transported has to be given,

Q: 5. Carbon-11, used in medical imaging, has a half-life of 20.4 min. The carbon-11 nuclides are…

A: Answer: Relation between quantity of radioactive substance and n number of half lives is shown…

Q: Strontium-90 is present in the fallout produced by nuclear weapons testing in the atmosphere. Sr-90…

A:

Q: 15. A mammoth skeleton has a carbon-14 decay rate of 0.48 disintegrations per minute per gram (0.48…

A:

Q: 8. What mass of plutonium-240 will remain after 32,820 years if the initial sample contained 4.8 g…

A: No. of half lives = Total time/ half- lives n = 32820/6564 = 5 n = 5

Q: The half-life of 129I is 1.72 x 107 years. Consider a sample that contains 2.39 x 106 atoms of this…

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Q: Magnesium-23 is a positron emitter with a half-life of 11.3039 min. How much of a 1.80-g sample of…

A: Radioactivity is a phenomenon in which nuclei of certain elements undergo spontaneous disintegration…

Q: On the Simpsons, Professor Frink discovered the element frinkonium. How many days will it take for a…

A: Given -> Initial weight of sample = 40.0 mg  Final weight of sample = 1.25 mg  Half life = 26.3…

Q: If 25.35 grams of radioactive waste reduces to 9.75 grams of radioactive waste after 1350 years,…

A: Given, time = 1350 years  Half life , t1/2 = ?

Q: The first-order decay of radon has a half-life of 91.75 hours. How many grams of radon remain after…

A:

Q: 8. Strontium-90 has a half-life of 28.1 years. Starting with 2.08 mg of this isotope, what is the…

A: Radioactive decay follows first order kinetics. Using this we will calculate all parts of questions.

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: Suppose 67.5% of a sample of radioactive 24Na has decayed after one day. Estimate the half-life of…

A: Solution is given below in next step

Q: Carbon-11 is a radioactive istope of carbon. Its half-life is 20.3 minutes. What fraction of the…

A:

Q: Calculate the half-life of a radioisotope if it takes 144 years for a sample to decay to 12.5% of…

A: N = 0.125 No N/No = 0.125

Q: A wooden artifact from a Chinese temple has a ¹4C activity of 24.9 counts per minute as compared…

A: we have to calculate the age of the sample of wooden artifact

Q: A certain isotope has a half-life of 2.00 days. How much of a 4.00g sample of this isotope will…

A: Since the decay reactions are first order reactions Hence we can say  1) Half life = ln(2) / K 2)…

Q: On the Simpsons, Professor Frink discovered the element frinkonium. How many days will it take for a…

A:

Q: A certain radioisotope has a half-life of 6.58 days. What percentage of an initial sample of this…

A:

Q: 4. How long will it take for a sample of iron-55 to decay to 1/64 of its original mass if iron- has…

A: Radioactive decays are always first order reaction. So we will use rate law equation of first order…

Q: Phosphorus-32 is a radioactive isotope used as a tracer in the liver. How much phosphorus-32 was…

A:

Q: A radioisotope “X” has a half-life of 2.5 years. Determine (to the nearest 0.1 mg) how much of a…

A: All the radioactive reactions follow first order kinetics . The term half life is defined as the…

Q: 4. After 24.0 days, 2.00 grams of an original 128.0 gram sample remain. a. How many half-lives…

A: 4) Given that Initial mass of the sample (C0) =128.0 g  Mass of the sample remained after 24.0 days…

Q: A scientist is taking measurements on an unknown isotope to determine its half life. If the…

A: Radioactive decay is followed first order kinetics  Decay constant                  λ =2.303t…

Q: Suppose 62.0% of a sample of radioactive polonium-218 remains after 2.14 minutes.  Estimate the…

A: The half life of Po-218 has to be determined. Given data contains, Time taken is 2.14 minutes.…

Q: The half-life of carbon-14 is 5,730 years. Write the exponential decay function and find k. If the…

A: Half life:It is represented by the symbol t1/2. It was discovered by Rutherford. It is defined as…

Q: One of the radioactive isotopes used in chemical and medical research is iodine-125, which has a…

A:

Q: he half-life of 14/6 C is 5730 years. If a mummy wrapping contains about 1/2 as much 14/6 C as…

A:

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: Fluorine-18 decays to form a positron and oxygen-18. After 90.0 minutes, 1.00 18O is present…

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Q: Isotope X has a half-life of 71.8 years. If a sample initially contains 676. mg of X, what mass of X…

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Q: A radioactive sample contains 2.90 gg of an isotope with a half-life of 3.8 days How much of the…

A: Given- Initial mass = 2.90 g Half life = 3.8 days To find- mass of the isotope in grams remaining…

Q: A 50.0 mg sample of an unknown radioactive substance was placed in storage and its mass measured…

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.