The half-life of cesium-129 is 32.0 hours. How much time is required for the activity of a sample of cesium-129 to fall to 7.61 percent of its original value? hrs

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 bismuth-210, 210Bi, is 5 days. (a) If a sample has a mass of 216 mg, find the…

A: The decay of radioactive elements follows first order kinetics. So we would use first order reaction…

Q: If the amount of a radioactive element decreases from 0.36 g to 90. mg in 22 min, what is its…

A: Half-life (t1/2) is defined as the time required by a substance to reduce to half of its initial…

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 laboratory investigation shows that a sample of uranium ore contains 10.88 mg of 238U 92 206…

A: Radioactive decay is the process where the unstable nuclei get converted into stable daughter nuclei…

Q: What is the half-life of bismuth-214 if 62.5 minutes are required for the activity of a sample of…

A:

Q: The half-life of cesium-129 is 32.0 hours. How much time is required for the activity of a sample of…

A: Radioactive decay follows the first-order kinetics. The decay constant (λ) and half-life of a…

Q: A 1.55 g sample of an isotope has a half-life of 3.8 days. What mass of sample is left after 5.5…

A: given data,sample of an isotope or initial amount of sample =1.55 g sample half life =3.8…

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. How…

A:

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: Plutonium-236 is an alpha emitter with a half-life of 2.86 years. If a sample initially contains…

A: Given, half life of Pu -236, t1/2 = 2.86 years            initial mass of Pu -236= 2.35 mg The…

Q: Given that radioactive cobalt-60 has a radioactive constant equal to 3.8 x 10 determine its…

A: Now in order to calculate the half life we first write down the given data: Radioactive…

Q: The half-life of cesium-129 is 32.0 hours. How much time is required for the activity of a sample of…

A: Given  Half life of cesium - 129 =  32 hours  Remaining activity [ A ] = 14.5 %  Time ( t ) = ?

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: 4. The half-life of bismuth-212 is 1 hour. If 12g of bismuth are allowed to decay, what mass of…

A:

Q: 9. Radon-222 has a half-life of 2.8 days. How many half-lives will pass after 28 days? O 19 10 15 05

A:

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. How…

A: We have to predict the time taken.

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: Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The…

A: Time required for the activity of a sample of iodine-131 to fall to 5.57 percent of its original…

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

A: Radon 222 is a radioactive substance which undergoes radioactive decay Here we are required to find…

Q: Technetium-99 (half-life = 6.01 h) is used in medical imaging. How many half-lives would go by in…

A: a) Given t1/2 = 6.01 h 100% →6.01 h 50 % →6.01 h 25 % →6.01 h12.5 % →6.01 h 6.25 % →6.01 h 3.125 %…

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: Cesium-137 is part of the nuclear waste produced by uranium-235 fission. The half-life of cesium-137…

A:

Q: Thallium-201 is used medically to diagnose heart problems. The half-life of thallium-201 is 72.9…

A:

Q: Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium- 67 is 78.2 hours.…

A: Given   The half-life is 78.2 hours. The fall in activity of gallium-67 is 29.1 percent of its…

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

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: 19. The half-life of the radio-isotope iodine - 131 is 8 days. What fraction of the original iodine…

A: Half life of the reaction is the time in which the reactant becomes half of the initial reactant. It…

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: What is the half-life of radium-226 if 3.41x10 years are required for the activity of a sample of…

A:

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

A: We know that the radioactive decay follow first order reaction.

Q: Thallium-201 is used medically to diagnose heart problems. The half-life of thallium-201 is 72.9…

A:

Q: percentage of his original carbon-14

A:

Q: 1.50 moles of a radio nuclide emits 3.09 x 1010 beta particles per second. assumed that each beta…

A: Here 1.5 moles of radio active nuclide emits 3.09×10^10 beta particles per second. We have to…

Q: Thallium-201 is used medically to diagnose heart problems. What is the half-life of thallium-201 if…

A: Time = 128 hours  t1/2 = ?

Q: (c) Given that radioactive cobalt-60 has a radioactive constant equal to 7.6 x 10 s', determine its…

A:

Q: How many half-lives does it take a 10.0 gram sample of 12353I to drop to 0.625 grams? What length…

A: The time has to be calculated

Q: How many milligrams remain of a 15.0 mg sam- ple of radium-226 after 6396 years? The half-life of…

A:

Q: A sample of radioactive radon-222 was found to have a half life of 3.823 days.  What fraction of…

A: All natural and artificial radio active decays follows first order kinetics  The integrated rate…

Q: The half-life of Th-232 is 1.4 x 10^10 years. If there are 50.0 g of the sample left after 5.6 x…

A: Calculate number of half-life:

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: The half-life of bismuth-212 is 1 hour. If 12g of bismuth are allowed to decay, what mass of bismuth…

A: The time taken during a reaction to reduce the concentration of a reactant to half of its initial…

Q: The half-life of cesium-129 is 32.0 hours. How much time is required for the activity of a sample of…

A:

Q: Thallium-201 is used medically to diagnose heart problems. The half-life of thallium-201 is 72.9…

A: Radioactive decay follows the first-order kinetics. The decay constant (λ) and half-life of a…

Q: What is the half-life of thallium-209 if 4.20 minutes are required for the activity of a sample of…

A: The radioactive disintegration is a type of first order kinetics which has its half-life given as -…

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: 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: Polonium-210 is a radioactive substance with a half-life of 138 days. If a nuclear facility is…

A:

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.