A wooden artifact is burned and found to contain 21g of carbon. the 14c activity of the sample is 105 disintegration/min. what is the age of the artifact?

Q: A wooden artifact is burned and found to contain 21g of carbon. The 14 C activity of the sample is…

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Q: Iodine-131 has a half life of 8.0 days determine how many days must elapse for a 0.80 mg sample of…

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Q: A sample of wood from an Egyptian mummy case has a specific activity of 9.41 d/min-g. How old is the…

A: Solution: We know that --- for a sample of wood from an Egyptian mummy which is related to…

Q: While exploring a coal mine, scientists found plant fossils which had been preserved by an…

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Q: The carbon-14 activity in papyrus growing along the Nile River today is 231 decay events per…

A: Given data,Initial activity of C-14=231 decay events/KgFinal activity of C-14=140 decay…

Q: A 116.8 ng sample of an unknown radioactive substance was placed in storage and its mass measured…

A: Given- Initial amount=116.8ng Final amount=14.60ng Time=47days

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: Samples recovered from an archaeological site are determined to have a 14C activity of 1.3 dpm/g.…

A: Given:   The activity of C-14 from recovered sample is 1.3 dpm/g. The activity of C-14 in living…

Q: Calculate the half-life of a radioisotope if it takes 72 years for a sample to decay to 12.5% of its…

A: 100 % to 50 % one t1/2. 50 % to 25 %  second t1/2. 25% to 12.5 third t1/2. three t1/2 = 72 years.…

Q: Since the radioactivity of 233UF6 with a mass of 0.420 g is 9.88 * 104 Bq, find the half-life for…

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Q: How long does it take a 100.00g sample of As-81 to decay to 6.25g?

A: remaining amount of radioactive substance is related with initial amount according to following…

Q: A wooden artifact is found in an ancient tomb. Its carbon-14   activity is measured to be 61.0% of…

A: Activity of carbon-14 = 0.61 R/Ro = 0.61 We will use the below equation for decay process- R=…

Q: .6. A sample of (_16^35)S, a ß- emitter, has an activity of 0.100 µCi. In 20.0 days, the activity of…

A: The rate of the reaction is referred to the change in the molar concentration in the distinct…

Q: What is the half‑life of an isotope that decays to 6.25%6.25% of its original activity in 24.2…

A: The half-life  is the time it takes for the concentration of that substance to fall to half of its…

Q: A fossilized bone is found to contain 1/1000 the original amount of C – 14. Determine the age of the…

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Q: After 3 half-lives, the activity of a radioisotope drops to _____ of the original. Group of answer…

A: We have to predict the activity with respect to original activity.

Q: a.)%decayed on November 26, 2019 b.)fraction of sample remains a year after Nov. 26,2019 c.)date…

A: From given data  We conclude   Sample was unearthed  On October 26, 2019  So it is the initial time,…

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: If a radioisotope's half-life is 2 minutes, after two half-lives there is left   0% of the original…

A: Given, a radioisotope's half-life is 2 minutes.we are asked to calculate the amount of original…

Q: A sample of a wooden artifact is found to undergo 9.0 C-14 disintegrations per minute per gram of…

A: Given value of half life = 5730 years

Q: Some mammoth bones found in Arizona were found by carbon-14 dating to be 1.13x104 years old. What…

A: Given: Original activity = 15.3 disintegrations per minute per gram. Age of bones = 1.13 × 104…

Q: How many nanograms 192-Ir are present in an iridium seed with an activity of 0.500 mCi? The atomic…

A: Given seed contains , Ir-192. Activity of Ir-192 = 0.500 m Ci

Q: A piece of wood from an ancient artifact has a carbon-14 activity of 11.7 disintegrations per min.…

A: Decay reactions are first order reactions. Since we know that the relationship between the activity…

Q: some mammoth bones found in Arizona were found by Carbon-14 dating to be 1.113 x 1014 years old.…

A: We have The half-life of C14 is 5730 years t12=0.693k.......1 By rearranging the equation 1, we get…

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: In 1947 samples of the Dead Sea Scrolls were analyzed by carbon dating. It was found that the…

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Q: In the decay series of thorium-232, thorium-232 decays to radium-224 and then to radon-220. What…

A: Given, In the decay series of thorium-232, thorium-232 decays to radium-224 and then to radon-220.

Q: 14.25 A wooden artifact is burned and found to contain 21 g of carbon. The ¹4C activity of the…

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Q: A sample of a wooden artifact gives 5.0 disintegrations/min/g carbon. The half-life of C-14 is 5730…

A: Half life is defined as the time taken by a radioactive sample to decay to half of its original…

Q: 2 mol of beryllium-8 nuclei combine to form 1 mol of oxygen-16. The mass decrease is 0.0157 g.…

A: Solution Nuclear reactions, like chemical reactions, ar in the middle of changes in energy. The…

Q: 50) Platinum-194(194Pt) decays to Osmium-190 What particle is emmitted.

A: Chemical symbol of osmium is Os.

Q: A vial of radioactive material is found at a site where it was left unattended. At the time the vial…

A: Given : Initial mass of reactant = 10 g And mass of reactant after 4 days = 8 g

Q: A radioactive source containing Y-90 has an initial activity of 20 µC a) How many decays per second…

A: The radioactive source containing Y-90 has an initial activity 20 μCi which equals…

Q: A 50.0g sample of nitrogen-16 takes 14.4 second to decay to a mass of 12.5G. Calculate the half life…

A: Given: The time taken by N-16 to undergo decay, t = 14.4 sec The initial amount of N-16, No = 50.0 g…

Q: sample of Uranium ore is estimated to have originally contained 805 mg of uranium-238. Analysis…

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Q: What is the age of the artifact?

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Q: A wooden artifact is burned and found to contain 21 g of carbon. The 14C activity of the sample is…

A:

Q: unknown sample contains radioactive element U-235. If the original amount present is 3500 atoms, how…

A: Given- Number of initial atom =3500 atoms Number of final atom =125 atoms  Half life =700 million…

Q: Predict the mode of decay begin 65^N undergoes. Positron Beta It is stable and does not undergo…

A: The beta decay of 65Ni is shown

Q: A sample of thorium-232 decays via the following sequence of emissions: alpha, beta, beta, alpha.…

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Q: Po-214 undergoes the following sequential decays: alpha plus gamma, followed by beta. The product of…

A: For alpha decay, a alpha  particle  is emitted from parent atom.  An alpha particle is a Helium ion…

Q: The accompanying figure illustrates that after two half-lives, ____ percent of the parent…

A: It is given a graph of half-life at x-axis and parent isotope remaining in percentage at the y-axis,

Q: If 1.50 gram of a 2.00 gram sample of a radioactive substance undergoes decay in 60 minutes, then…

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Q: A mixed thorium decay product sample is separated into elements, yielding a 1.19mg sample of…

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Q: Hydrogen-3 is radioactive and has a half life of 12.3 years. How long would it take a sample to…

A: Given that -  Hydrogen-3 is tritium which is a radioactive isotope with half life = 12.3 years…

Q: A bottle of wine, which was analyzed for its tritium (3H) content, was found to contain 13.35% of…

A: We have half life of the 3H that we can use to calculate the rate constant . We know that…

Q: time for amount of initial radioactivity radionuclide to decrease to 1/16 of initial amount

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Q: Predict the mode of decay begin 65^ Ni undergoes.

A: The heavier isotopes having mass number more then 200 under go alpha decay. Light isotopes( mass…

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.