A sample of TI-201 has an initial decay rate of 5.88 x 10' dis/s. How long will it take for the decay rate to fall to 287 dis/s? (TI-201 has a half-life of 3.042 days.)

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: Given  Half life of Ga- 67 = 77.9 hours  decay % = 95 %  Time ( t ) = ?

Q: Cesium-131, 13 Cs, is a radioactive isotope used to treat prostate cancer. The half-life of 131 Cs…

A: Rate constant ( k ) = 0.6931 / half life  Rate constant (k) = 0.6931 / 9.70days  Rate constant (k) =…

Q: You have a sample of unknown medication that is radioactive. You believe you should be able to…

A: Given: The initial activity, (A0) = 1.14×106 Bq. The activity after 11.1 hrs, (A) =  6.60×105 Bq.…

Q: The nuclide 241Am is used in smoke detectors. As it decays (with a half-life of 458 years), the…

A: Radioactive decay follows the first order kinetics and every radioisotope has distinct…

Q: The carbon-14 decay rate of a sample obtained from a young tree is 0.260 disintegration per second…

A: Initial rate of disintegrations = 0.260 Final rate of disintegrations = 0.186  Half live = 5630yr…

Q: How much time in minutes would it take for a 2.301 g sample of 3H to decay to a mass of 1.789 g if…

A: The initial concentration (N0), final concentration (N), and time (t) required to convert the…

Q: Radium 223 decays with a half life of 11.4 days. How long will it take for a 0.240mol sample of…

A: Half life of radioactive elements is given by    t1/2 =0.693λ      λ = disintegration constant.…

Q: A sample of rock was found to contain 8.23 mg of rubidium-87 and 0.47 mg of strontium-87.(a)…

A:

Q: Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 x 1010 years. What is the…

A:

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

A:

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

A: Radioactive disintegration follows first order reaction and decay rate equation can expressed as,…

Q: You have a sample 100.0 g sample of lodine-135. a) Determine the half-life of a radionuclide if…

A:

Q: CHEMWORK Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 x 1010 years.…

A:

Q: Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 × 1010 years. What is the…

A: Radioactive decay reactions follow first order kinetics.

Q: We have an initial amount of H3N2C14 of 72 milligrams, and a half-life of 30 days. Find the decay…

A:

Q: What is the age of a fossil that has a carbon-14 decay rate of 6.5 disintegrations per minute per g…

A: Formula used y=a e-nt where y is the final  amount of death = 6.5dis/min           x is the initial…

Q: Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 x 1010 years. What is the…

A: Given-> Half life(t1/2) = 4.7 × 1010 year Initial amount = 108.2 + 4.7 = 112.9 microgram Final…

Q: Iodine-131 has a half-life of 8.04 days. If you begin with 2.7 mg of radioactive "I what mass…

A: Half-Life: The half-life of a radio active material will tell us the time it takes for one-half of…

Q: For a radioactive isotope with t1/2 %D 38.7 hr, how many hours will it take for a 3.27 mCi sample to…

A:

Q: (Q111) In the next step of the neptunium-237 decay series, very unstable francium-221 is produced.…

A:

Q: (a) What mass of Na₂38SO4 has an activity of 11.7 mCi? Sulfur-38 has an atomic mass of 38.0 and a…

A:

Q: What is the correct symbol that is missing from the radioactive decay reaction below, and what type…

A: In decay reaction, we have to balance both atomic number and mass number.     We know Helium  is…

Q: The carbon-14 decay rate of a sample obtained from a young tree is 0.252 disintegration per second…

A: Decay process is a first order reaction. Therefore we have to put the integrated rate law for first…

Q: How long does it take for 105 mg of tritium H to decay to 35.0 mg? The half-life of tritium is 12.3…

A: All radioactive decays are first order reaction.

Q: A sample of Tl-201 has an initial decay rate of 5.88 × 10^4/s. How long will it take for the decay…

A: First, the rate constant value is determined by using the given half life period.

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

A:

Q: Iodine-131 undergoes beta emission with a decay constant of 0.0864 1/days. If you start with 35.0 mg…

A:

Q: Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 x 1010 years. What is the…

A:

Q: Iodine-131 is an important radioisotope of iodine that has a radioactive decay half-life and is…

A: Iodine-131 is an important radioisotope of iodine that has a radioactive decay half-life and is…

Q: A sample of F-18 has an initial decay rate of 1.5 x 10° dis/s. How long will it take for the decay…

A: When an atomic nucleus breaks down by itself that results in the release of energy and matter, such…

Q: Assuming that many radioactive nuclides can be consid-ered safe after 20 half-lives, how long will…

A: It is given that many nuclides can be considered safe after 20 half-lives. Given data: Half-life…

Q: For a radioactive isotope with t1/2 38.7 hr, how many hours will it take for a 3.27 mCi sample to…

A:

Q: a. Write the β- decay reaction.  b. What is the initial number of Cs-137 atoms in the sample?   c.…

A: Nuclear kinetics follows first order kinetics and all formulas of first order reaction is applicable…

Q: Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 × 1010 years. What is the…

A:

Q: 10. The carbon-14 decay rate of a sample obtained from a young tree is 0.260 disintegration per…

A: Given information:Decay rate of young sample = 0.260 disintegration per secondDecay rate of another…

Q: Radium-226 (atomic mass = 226.025402 amu) decays to radon-224 (a radioactive gas) with a half-life…

A:

Q: Iodine-131 is an important radioisotope of iodine that has a radioactive decay half-life and is…

A: Half llife: it is the time taken by a certain amount of a radioactive isotope to disintegrate to…

Q: What is the initial activity of a 5 g radioactive source of 60Co given that the specific activity of…

A: Since you have asked a question with multiple subparts, we will answer only first 3 subparts for…

Q: A sample of F-18 has an initial decay rate of 1.5 × 10^5/s. How long will it take for the decay rate…

A: Radioactive decay is a first-order decay process.Given, half-life of F-18, t1/2 = 1.83 hours.Initial…

Q: An artifact classified as bone, found in a site at Paviland Cave, Wales, is found to have a ¹4C…

A: Given that -  Initial activity , [A]0 = 0.255 counts per second per gram Carbon  Final activity, [A]…

Q: A radioactive isotope has a half-life of 84.5 minutes. How long will it take for the radiation from…

A: Half life t1/2 = 84.5 min = 5070 s

Q: 3.7. The radioactive nuclide Co has a half-life of 5.27 years. Calculate the mass of Co that remains…

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

Q: 16. Are the following decays possible? If not, why not? a. 2Th → U + a h Pu → U + a c. P→S + e 232…

A: Starting with the first reaction,  Using the conservation of Z and A numbers we have            232…

Q: From Chernobyl, 6e6 Ci of Cs-137 was released in 1986.  Cs-137 has a half-life of 30 years.  The…

A: Here we are required to find the activity of C-137 in the year 2022

Q: 32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 91.3 g of ²P, how…

A: The answer to the following question is- half life = 14.3 days ,

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

A: Given,Carbon-14 decay rate of 0.48 dis / min · g CCarbon-14 decay rate of 15.3 dis / min · g C

Q: Os-182 has a half-life of 21.5 hours. How many grams of a 10.0 gram sample would have decayed after…

A: