How many half-lives does it take a 10.0 gram sample of 12353I to drop to 0.625 grams? What length of time is this? (The half-life of 12353I is 13.1 hours.)

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: The half-life of 234U, uranium-234, is 2.52 105 yr. If 98.9% of the uranium in the original sample…

A:

Q: Krypton-79 has a half-life of 34.50 h. After 138.0 h, 54.25 kg of this radioistope is left. How much…

A: Given, the half-life of Krypton-79 is 34.50 hthe amount of radioisotop left after 138.0 h is 54.25…

Q: The half-life of Oxygen-14 is 1.177 minutes.  You originally have 20 grams of it.  After roughly 3.5…

A: Given: Half-life of Oxygen-14 is 1.177 minutes Mass of Oxygen-14 is 20 g

Q: half-life of this isotope?

A: The half –life of Bismuth-218 isotope

Q: If you start with 71.0 grams of a radioactive substance with a half life of 3 days, how much will be…

A: Here given, Initial amount (N0) = 71 grams Half life (t1/2) = 3 days Time (t) = 15 days Amount left…

Q: Gold-198 is used in the diagnosis of liver problems. If the half-life of Au-198 is 2.69 days: b. If…

A: Half life = 2.69 day Initial amount = 9.21 mg  Time = 72.9 days

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

A: The process in which energy is lost by unstable atomic nucleus via radiation is known as radioactive…

Q: The answer should be 26.7 days

A: Half-life:The time taken for half disintegration of radioactive element from its original amount is…

Q: The half life of Radium-226 is 1590 years. If a sample contains 500 mg, how many mg will remain…

A: given :-  initial amount of sample = 500 mg  half life = 1590 years  To calculate :-  amount of…

Q: Carbon -14 has a half-life of 5.730 x 10 3 years.  If the original mass of the parent is 501.695 g,…

A:

Q: Radioactive radon-222, found in many homes, is a potential health hazard. The half-life of radon-222…

A: Given -> Half life = 3.82 days

Q: Potassium 40 has a half life of 1.3 billion years.  If no half lives had passed, what percentage of…

A: A numerical problem based on half life period, which is to be accomplished.

Q: 100.0 grams of an isotope with a half-life of 36.0 hours is present at time zero. How much time will…

A: Radioactive decay follows first order kinetics. Given that half life is 36 hours. So the rate…

Q: A 4.0 g sample of Ra-226 decays to 1.0 g. If the half-life of Ra-226 is 1620 years, how much time…

A: Given initial concentration of Ra-226 = [Ra-226]0 = 4.0 g  Final concentration = [Ra-226] = 1.0 g…

Q: the Cs-131 by life has a half life of 30 years. after 120 years, 2.6 g remain. what is the original…

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Q: The half life of radium 226 is 1602 years. If you have 500 grams of radium today how many grams…

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: The half life of bismuth-213 is 46 minutes.  How much of a 20 g sample of bismuth-213 is left after…

A: The unstable nucleus or isotope undergoes radioactive decay to form a stable nucleus. This process…

Q: Can the half-life of a given isotope be manipulated or changed to suit human needs?

A: Answer

Q: A radioactive waste from a clinical laboratory contains 0.2 µCi (microcuries) of calcium-45 (45Ca)…

A: Answer -

Q: A piece of a spear handle is found in an archaeological dig in Central America. It contains 41.7% as…

A: Given, half life of C14 = 5730 yr

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: II 24 Iours, what is the half-life of Ra-226 in years? 27 3. Arsenic - 70 has a half life of 140…

A: As per our guidelines we can only solve first question. Please resubmit the other questions as next…

Q: How much of a 24-gram sample of Radium-226 will remain unchanged at the end of three half-life…

A: 19) Given : Initial mass of radium-226 = 24 g And time passed = 3 half lives.

Q: The half-life of copper-67 is 61 hours.  If an original sample contains 24 grams how many grams are…

A:

Q: After 60 days, 10 grams of radioactive isotope remains from an original 80 g sample. What is the…

A: Law of radioactive decay: Law of radioactive decay relates the amount radioactive substance…

Q: percentage of his original carbon-14

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: How many half-lives did a radio-active sample complete is 2.5 g of a sample remains from 20.0 g…

A: Half-life time: The time in which the concentration of the radioactive species decreases to half is…

Q: In a 3 X 109 -year-old rock that originally contained some 238U , which has a half-life of 4.5 X 109…

A: Half-life is defined as the time in which the original numbers of nuclei are decayed to half. In the…

Q: The half-life of Po-214 is 0.001 seconds. How much of a 10 gram sample is left after 0.003 seconds?…

A: We know radioactive decay follows first order reaction kinetics, therefore  t1/2=0.001 s and…

Q: A 26.00-g sample of water containing tritium, 3 1H, emits 1.50 * 103 beta particles per second.…

A: In radioactive decay, radioactive atom's nuclei (unstable) eject energy as well as charged particles…

Q: If a rock contained 12.0 g of 4°K when the earth was formed 4.54 billion years ago and the half-life…

A:

Q: The radioactive nuclide ⁶⁰₂₇ Co has a half-life of 5.27 years. Calculate the mass of ⁶⁰₂₇Co that…

A: Given,

Q: 12. A year ago there were 4 grams of a radioactive substance. Now there are 3 grams. How much was…

A:

Q: After 103 days, only 2.3 g of a radioisotope remains from a sample that originally has 150 g of it.…

A:

Q: The half life of radium-226 is 1600 years. How many grams of a 0.25g sample will remain after 4800…

A: After decying the nucleus it emits radiation of electromagnetic rays ,of certain Wavelength.

Q: The radioactive isotope *Pa decays by beta emission. 234 If the mass of a sample of protactinium-234…

A: Initial mass of isotope M = 83.5 ug Final mass of isotope M' = 20.9 ug  Time of decay t = 13.5 hours…

Q: After 60 days, 10 grams of radioactive isotope remains from an original 38 g sample. What is the…

A:

Q: A solution of sodium iodine containing the radioactive isotope lodine-131 was given to a patient. If…

A: These radioactive decay reactions are the first order reactions . In these type of reactions , rate…

Q: The Cs-131 nuclide has a half-life of 30 years. After 120 years, 6.6 g remain. What is the original…

A: Radio active decay obeys first order kinetics. The expression for rate constant:   Half life of…

Q: If the half-life of a radioactive isotope is 3.5 minutes, how many grams of a 200-gram sample would…

A: The interval of time required for a radioactive isotope to decay to one-half of its atomic nuclei is…

Q: An 80.0 g sample of iodine-131 was placed in a sealed vessel forty days ago. Only 2.5 g of this…

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

Q: When will a 1.00 g sample of thorium–232 have a mass of 1.00 mg, knowing that the half – life of…

A:

Q: In a 3×109 -year-old rock that originally contained some 238U , which has a half-life of 4.5×109…

A: Since 238U has a half-life of 4.5 × 109 y, it is useful for dating only very old materials, showing,…

Q: The half-life of ZN-71 is 3.2 minutes. If one had 120.0g at the beginning, how many gram would be…

A: Half lives formula  used  2n=[A0]/At Where  n= Half lives

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.