A The balf-life of barium-131 is 12 days. How many grams remains after 60 days if the initial sample had a mass of 10 g?

Q: The half-life of bismuth-210, 210Bi, is 5 days.(a) If a sample has a mass of 200 mg, find the amount…

A: Solution-  (a)-The half life periods of Bismuth-210 is 5days.the rate of decay of any substance…

Q: A 6.00g sample of Iodine-131 decays until there is only 0.75g of Iodine-131 remaining. How much time…

A: Given data:

Q: A sample of polonium-210 has a half-life of 138 days a)What fraction of polonium-210 remains after…

A:

Q: 1. The radioactive nuclide has a half-life of 17.5 hours. What a 0.0100 g sample after 24.0 hours…

A:

Q: The half-life of 238U is 4.5 * 109 yr. A sample of rock of mass 1.6 gproduces 29 dis>s. Assuming…

A: The given data contains, mass = 1.6 g. half life=4.5×109 year.

Q: If the half-life of 100.0 grams of a radioactive isotope is 8 years, how many grams will remain in…

A:

Q: If a rock contained 12.0 g of ⁴⁰K when the earth was formed 4.54 billion years ago and the half-life…

A: Given information is as follows; Initial mass of ⁴⁰K in the rock A0 = 12.0 g Final mass of ⁴⁰K in…

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: An ancient skull has a carbon-14 decay rate of 0.85 disintegration per minute per gram of carbon…

A: It's a nuclear decay reaction. Therefore, it will follow first order kinetics. And since it is…

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 3.70 billion years old by…

A: Since this is a first order decay The rate constant with half life is given by…

Q: How much of a 0.15 g sample of U-238 after the passage of 3200 years? Half-life is 4.01x10° vears.

A: To determine the amount of 0.15 g radioactive substance left after 3200 years if the half-life is…

Q: How much of a 0.15 g sample of U-238 after the passage of 3200 years? Half life is 4.01×10⁹ years.

A: Given: Mass of sample = 0.15g Duration of decay= 3200 years. Half life= 4.01×109 years To find: The…

Q: A radioactive isotope decayed to 17/32 of its original mass after 60 minutes. Find the half-life of…

A: All radioactive decays follows first order kinetics . The integrated rate equation for first order…

Q: The radioactive nuclide has a shelf-life of 17.5 hours. What mass remains from 0.0100g sample after…

A: Shelf-life of 17.5 hours, Calculate the mass remains from 0.0100 g after 24 hours.

Q: If the half life of a radioactive isotope is 3 minutes, how much of an 8 Ci sample would remain…

A:

Q: A patient receives 9.2 ng of a radioisotope with a half-life of 12 hours. How much will remain in…

A:

Q: el The half-life of barium-131 is 12 days. How many grams remains after 60 days if the initial…

A: We have to predict the amount left after certain time.

Q: An ancient skull has a carbon-14 decay rate of 0.85 disintegrationsper minute per gram of carbon…

A:

Q: The half-life of tritium is 12.32 yrs. If 49.1 mg of tritium remains of a sample with an initial…

A:

Q: 2 A rock 0:257 mg of Pb-206 for every milligram of u of U-238 to Pb-206 is Cantains V-238.the half…

A: The answer to the following question is-

Q: The half-life of tritium is 12.32 yrs.If 49.1 mg of tritium remains of a sample with an initial mass…

A: The question is based on the concept of chemical kinetics. we have to calculate how much time has…

Q: A radioactive sample contains 1.55 g of an isotope with ahalf-life of 3.8 days. What mass of the…

A: Radioactive isotopes may occur naturally or be artificially produced. Radioactive isotopes possess…

Q: The initial amount of thorium-232 in a rock is determined to be 6.78mg. it now has 5.32 mg of…

A:

Q: A sample of iodine-126 with an original mass of 15.00 mg loses 13.125 mg of the original mass of the…

A:

Q: If the half-life of a radioactive isotope is 32 days, how many half-lives must pass before a 3.0…

A: Radioactive decay follows the first-order kinetics. The half-life of the first-order reaction does…

Q: if 8.000 grams of U-234 are sealed in a container and then opened many years later -- how much time…

A:

Q: An unknown radioactive substance is currently decaying. Initially, the sample contained 16.1g of the…

A:

Q: 2) The half-life of Carbon-14 is 5730 years. i) Find the valuer so that A(t) = A0e-rt gives the…

A:

Q: After 40.0 days, how much Ac-225 remains if the starting mass was 94.0 g? Ac-225 has a half life of…

A:

Q: A The half-life of barium-131 is 12 days. How many grams remains after 60 days if the initial sample…

A:

Q: 20. At the time an item was produced, 0.01 of the carbon it contained was carbon-14, a radioisotope…

A: Solution

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 3.3 g remain. What is the original…

A: Answer

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: A moon rock collected by a U.S. Apollo mission is estimated to be 3.50 billion years old by…

A: Given : Time = 3.50 billion years old. Mass of uranium-238 = 1.540g Half life = 4.47 x 109 years

Q: 3.) The Radioactive nuclide co has a half-Life of 8.5 hours, 55 27 what mass of Co Temains from a.…

A: Mass of sample remains after 18 hours is       0.0045 g.

Q: Fluorine-21 has a half life of approximately 5 seconds. What percent of the original nuclei would…

A:

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 4.30 billion years old by…

A: Given: Age of rock = 4.30 billion years = 4.30 X 109 years Final mass of 238U remaining = 1.325 g…

Q: carbon-14 activity

A: Given data, Basic equation is Ae = Ao x 0.5 (t / t1/2)   Therefore,

Q: A skull believed to belong to an ancient human being has a carbon-14 decay rate of 6.50 dis/min.g of…

A: The half life for a radioactive element can be defined as the time taken by the half of the material…

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 4.2 g remain. What is the original…

A:

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

A: Given, N = 3.8 microgram No = 104.9 microgram t1/2 = 4.7 × 1010 year.

Q: If you have 2.00 grams of a radioisotope, with a half-life of 5 days, how much of the isotope is…

A: Given;

Q: An ancient skull has a carbon-14 decay rate of 0.85 disintegrations per minute per gram of carbon…

A: An ancient skull has a carbon-14 decay rate of 0.85 disintegrations per minute per gram of carbon…

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: The half-life of radon-222 is 3.8 days. How much of a 100 gram sample is left after 15.2 days?

A: Half life is the time taken by the original compound to reduce to it's half.

Q: Strontium-90 has a half life of 28 years. If a 5.31 mg sample was stored for 112 years, what mass of…

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

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 4.10 billion years old by…

A: Concept:  Radioactive decay: It is the process by which an unstable atomic nucleus loses energy by…

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 2.5 g remain. What is the original…

A: Given :-  Amount of sample left after 120 years = 2.5 g  Half-life kf Cs-131 nuclide = 30 years  To…

Q: A decay series starts with the synthetic isotope 23992U. Thefirst four steps are emissions of a β-…

A: The decay series of 23992U goes through two emissions of beta particles and two emissions of alpha…

Q: How many half lives must have passed for an isotope with a half life of 10 years to decay from 1600…

A: The radioactive decay follows the First Order kinetics.