A tiny sample of fabric is burned to CO2, and the 14C/12C ratio is 0.350 times the ratio in today’s atmosphere. How old is the fabric if the half-life of carbon–14 is 5730 years? a. 10,320 yrs b. 8,676 yrs c. 11,425 yrs d. 9,252 yrs

Q: If you accidentally spill phosphorus-32 onto your shoe, how long would it take before 99.9% of the…

A:

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

A:

Q: 5) Uranium is radioactive and decays into lead. This process can be used to date rocks. A piece of…

A: Amount of Uranium in the rock = 3.8 x 10-3 g Amount of lead in the rock = 2.4 x 10-5 g Half life of…

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: U-238 decays with the half-life of 4.47 billion years. Calculate the % of a sample left after 13.4B…

A: Given : Half life = 4.47 billion years  Time = 13.4 billion years.

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

A: Given- Initial mass = 120 mg Half life = 6.0 hrs To find- milligrams of the technetium 99M sample…

Q: Na-24 is a radioactive isotope that has a half-life of 15 hours. What percent of the original sample…

A: Radioactive decay follows first order kinetics.  k = 0.693/t0.5 ....(1)  Here, t0.5 = 15 hours…

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

A:

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

A: Formula for radioactive decay is given as,

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: 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: The half-life of Ga-67 is 77.9 hours. How long will it take Ga-67 to decay and lose 95% of its…

A: Radioactive decay follows first order kinetics. k = 0.693/t0.5 = 0.693/77.9 hour^-1 = 0.008896…

Q: 31. Uranlum 235 decays to Lead 207 with a half-life of 0.7 billion years. What Is age of a rock…

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Q: 32.  A specimen of charcoal found contains 57% as much 14C as a sample of present day charcoal. What…

A: Given : Half life = 5700 years

Q: If you have a sample of radioactive material that weighs 2 grams, and only 1 gram is left that is…

A: Initial nuclei = 2 grams. Reduced nuclei = 1 grams. Time = 5 years. Half life time of material = ?

Q: How long for Ce-144 (half-life: 280 days) to decay down to 0.50% of its original amount?   2,100…

A:

Q: 6. A rock contains 0.257 mg of lead-206 for every milligram of uranium-238. The half-life for the…

A: Given, Half-life - 4.5 × 109 yr. 1 mg U-238 contains 0.257 mg of Pb-206.

Q: After 42 years, what mass remains of a 200.0 g sample of a radioactive isotope with a half-life of…

A:

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: A piece of fossilized wood has a carbon-14 radioactivity that is 1/4 that of new wood. The half-life…

A:

Q: ives? A sample of Oxygen-19 has decayed down to 1/32 of its initial concentration a What is the…

A: We have to find half life

Q: The half-lives of different radioisotopes are given in the table. Radioisotope Half-life (min)…

A:

Q: A tree sample was uprooted and buried 60,000 years ago during part of the Wisconsin glaciation. The…

A:

Q: If there are 52 milligrams left from a 0.26-gram sample of a radioactive substance after 46 hours,…

A: In this question, we have to calculate the half life If there are 52 milligrams left from a…

Q: Chemistry If you have an 88 gram sample of radioactive material decaying and the half life is 12…

A: Introduction: Radioactive decay: Radioactive decay or nuclear disintegration is a process in which…

Q: A

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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: 11047Ag → 0.je + 110 48Cd For the nuclear reaction Starting with 200. g of Ag-110 in a container,…

A: Since you have asked multiple question, as per our company guidelines we are supposed to answer the…

Q: The practical limit for ¹4℃ dating occurs when its activity falls to 0.20% of its original value due…

A: The aim of this question is to explain the carbon-14 period is based on the decay of 14C, which has…

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

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Q: carbon as a piece of modern charcoal. How long ago was the tree burned to make the ancient charcoal?…

A:

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

A:

Q: Carbon-14 has a radioactive half-life of about 6,000 years. If an organism has 10 g of carbon-14 in…

A: Provided half life (t1/2)=6000year Also, provided time(t)=6000year Initial amount (A•)=10g of…

Q: If a rock sample was found to contain 1.27 x 10-7 mol of argon-40, how much potassium-40 would also…

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Q: A radioactive sample contains 2.45g. How much willl remain after 11.4 days? (Half life is 3.8 days)

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Q: Substance Q initially weights 120% of its remaining mass after its decay in 60 minutes. What is its…

A: Given  substance Q initial weight =120% of its remaining mass after its decay for 60 mins t=60…

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.