1. After 119 days have elapsed, 1/12 of a radioisotope sample remains undecayed. What is the half-life of the radioisotope?

Q: a. A 100.0 nanogram (ng) sample of sodium-24 was stored in a lead-lined cabinet for 2.5 d. How…

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Q: If a tree dies and the trunk remains undisturbed for 1.435 × 104 years, what percentage of the…

A: Cfinal / Cinitial = 0.5(time/half life ) where Cfinal = carbon content after time Cinitial = initial…

Q: Krypton-87 has rate constant of 1.5 x 10 -4 / s. What is the activity of a 2.0 mg sample?

A: Welcome to bartleby ! Introduction : We have to calculate activity of sample

Q: If a tree dies and the trunk remains undisturbed for 1.210 × 10⁴ years, what percentage of the…

A: given data is  half-life is 5730 years remains undisturbed for 1.210 x 104 years

Q: Sodium-24, which is used to locate blood clots in the human circulatory system, has a half-life of…

A: Half life period: The time required to decay half of the initial amount is known as half life…

Q: Phosporous-32 half-life is 14.3 days. A vial containing 10ug of P-32 is accidentally spilled into a…

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Q: radionuclide time for amount of initial radioactivity radionuclide to decrease to 1/8 of initial…

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

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Q: After 119 days have elapsed, 1/12 of a radioisotope sample remains undecayed. What is the half-life…

A: Amount of radioisotopes remaining = 112 of the initial amount Number of days taken for the decay =…

Q: If 29.5% of the original amount of 14C is present in a wooden tool at the time of analysis, what is…

A: Since the carbon decay is a first order kinetics reaction Hence for the first order reaction we can…

Q: The half-life of Po-218 is 3.05 minutes. How many minutes does it take for a sample of Po-218 to…

A: Given: Half-life of Po-218 = 3.05 minutes. And the final amount of Po-218 isotope remaining = 2.35 %…

Q: Fluorine-18, which has a half-life of 110 min, is used in PET scans.  If 100. mg of fluorine-18 is…

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

Q: Iron-59 is a radioisotope that is used to evaluate bone marrow function. The half-life of iron-59 is…

A: Half-life of Fe-59 = 44.5 days To calculate - Time required for the Fe-59 sample to fall to 9.36 %…

Q: Iodine-131 is administered orally in the form of Nal(aq) as a treatment for thyroid cancer. The…

A: Answer: Suppose initial quantity of Iodine-131 is N0  Then remaining after time t will be…

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: Iron-59 is a radioisotope that is used to evaluate bone marrow function. The half-life of iron-59 is…

A: Detail mathematical calculation is shown below

Q: 24 Am is used in many home smoke alarms. It has a decay half-life of 457 years. How long does it…

A: All radioactive decay follows first order kinetics. So in order to solve for the time required we…

Q: Iodine-131 is administered orally in the form of Nal(aq) as a treatment for thyroid cancer. The…

A: We know, radioactivity is an example of first-order reaction.

Q: Phosphorus-32 is used in biochemical studies to follow the pathway taken by metabolites. Its…

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Q: The half-life of iron-59 is 44.5 days. How much of a 3.00-mg sample will remain after 222.5 days?

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Q: The half-life of nucleus Rn-222 is 3.88 days. How many mg of a 5000 mg sample of Rn-222 remains…

A: Given, half-life of nucleus is 3.88 days.  The half-life can be calculated by the expression given…

Q: Cobalt-60 is used extensively in medicine as a source of g-rays. Its half-life is 5.27 years. How…

A: Given Half life ( t1/2 )   = 5.27 year  Initial Activity ( A0 )  = 100 %  Remaining amount ( At ) =…

Q: The half-life of Palladium-100 is 4 days. After 24 days a sample of Palladium-100 has been reduced…

A: N  = N0 e-λt  N0  = Initial mass of the sample N = Mass of the sample after a time 't' λ = decay…

Q: What is the half-life of iodine-123 if 37.7 hours are required for the activity of a sample of…

A: Radioactive decays follow first order kinetics.

Q: If a tree dies and the trunk remains undisturbed for 1.305 × 104 years, what percentage of the…

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Q: Cobalt-60 is used extensively in medicine as a source of g-rays. Its half-life is 3.97 years. How…

A: Given: Half-life of Co-60 = 3.97 years = 3.97 × 365 = 1449.05 days…

Q: Iron-59 is a radioisotope that is used to evaluate bone marrow function. The half-life of iron-59 is…

A: ⊙ Radioactivity, phenomena follow first order            kinetics                K =2.303t…

Q: The​ half-life of​ silicon-32 is 710 years. If 20 grams is present​ now, how much will be present…

A: Radioactive decay is always a first order reaction. The rate equation for the radioactive decay is :…

Q: 44 of 48 If the half-life of a radioisotope is 3 years, the radioactivity remaining in a sample of…

A: (a) the half life is 3 year, Now, amount of sample remaining after 6 years is, 6 years means 2 half…

Q: If a tree dies and the trunk remains undisturbed for 1.775 × 10⁴ years, what percentage of the…

A: Given-> Half life = 5730 year  Time = 1.775 × 104 year.

Q: An archaeologist claims that a bone in her collection is from a saber-tooth tiger that is believed…

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Q: After 19 days have elapsed, 1/21 of a radioisotope sample remains undecayed. What is the half-life…

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Q: iron-59 is a radioisotope that is used to evaluate bone marrow function. The half- ife of iron-59 is…

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Q: If a tree dies and the trunk remains undisturbed for 1.195 × 10⁴ years, what percentage of the…

A: Carbon dating is a technique to estimate the age of the tree or rock

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: How many half-lives have passed in each of the following situations? How much of a 48.0 g…

A: 1. The given half life of iodine-134 is 50 minutes. The total number of half-lives observed in 150…

Q: (c ) Iodine-131 has a half-life of 8 days. How many grams of I-131 in a 4.0 g sample remain after…

A: (c) The amount of the isotope that remains after given decay time is calculates by using below…

Q: The half-life of Palladium-100 is 4 days. After 20 days a sample of Palladium-100 has been reduced…

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Q: he​ half-life of the radioactive element unobtanium-37 is 5 seconds. If 32 grams of unobtanium-37…

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Q: Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET).…

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Q: If a 40.00 mg of I-131 decays 20.00 mg in 10 days and in another it would decay to 10.0O0 mg, what…

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Q: If a tree dies and the trunk remains undisturbed for 1.015 x 104 years, what percentage of the…

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Q: n unknown radioactive element decays into non-radioactive substances. In 440440 days the…

A: a) Given :-  Given that, in 440 days the radioactivity of a sample decreases by 37 percent.  i.e.…

Q: If a tree dies and the trunk remains undisturbed for 1.635 × 10⁴ years, what percentage of the…

A: Given, time t = 1.6 x 104 years , half life t1/2 = 5730 years

Q: Iodine-131 is administered orally in the form of Nal(aq) as a treatment for thyroid cancer. The…

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Q: 14.20 60Co is used extensively in medicine as a source of y-rays. Its half-life is 5.27 years. (a)…

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Q: What is the half life of sodium-24 if after 12 days the sample has a mass of 1.2 g from an initial…

A: Given, Initially mass of the sample (N0) = 9.6 g Mass of the sample after 12 days (N) = 1.2 g Time…

Q: The half-life of Palladium-100 is 4 davs. After 20 days a sample of Palladium-100 has been reduced…

A: The nuclear reactions of the radioactive elements are generally the first-order reactions. The…

Q: A 10.00-g plant fossil from an archaeological site is found to have a 14C activity of 3094…

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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.