Certain radioactive isotope has a half-life of 3.9 minutes. If we initially have 7168 grams of this substance, how many half-lives will pass until 7 grams remain? What length of time is needed for this decay process to occur?

Q: Carbon-14 has a half-life of 5730 yr. A living organism has an activity of 15.2 counts per minute…

A: The solution is as follows :

Q: Carbon-14 measurements on the linen wrappings from the Book of Isaiah on the Dead Sea Scrolls…

A: Given in the question, 79.5% of the carbon-14 is found in living tissue. Half life of C-14 = 5730…

Q: Strontium-90 Original amount: 5 g Amount left: 0.3125 g Total time: Half-life: 28.8 y Number of…

A:

Q: Carbon-14 Original amount: 60.0 g Amount left: 3.75 g Total time: Half-life: 5730 y Number of…

A:

Q: If two grams of a radioactive isotope has a half-life of twenty hours, the half-life of one gram of…

A: We will use first order intergrated rate equations and half life to answer this question.

Q: 3. Cobalt-60 has a half-life of 5.26 years. If 1.00 g of 6°CO were allowed to decay, how many grams…

A: 3) Given that: Half life of cobalt = 5.26 years Mass of cobalt = 1.0 g

Q: Half-life is the time required for a radioactive element to decay to half of its original mass.…

A: Given: The % of original radium sample=100% The % of a sample of radium that has decayed=75% The…

Q: A hospital patient receives a dose of Technicium-99m with a mass of 0.050mg. Given that the…

A:

Q: A radioactive isotope has a half-life of 84.3 minutes. How long will it take for the radiation from…

A:

Q: The radioactive element carbon-14 has a half-life of 5750 years. A scientist determined that the…

A:

Q: half-life of this isotope?

A: The half –life of Bismuth-218 isotope

Q: How much (in grams) of a 17.2-g sample of some radioactive element (half-life of 4 days) remains…

A: The given mass of the substance =  17.2 g The half-life of the substance (t1/2) = 4 days Time…

Q: If the half-life of a radioactive substance is 500 million years and you have 48 atoms of it, how…

A:

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: pile of radioactive material with a half-life of 10 years needs to sit until 0.0039 of the original…

A:

Q: Number of years Mass of original Carbon 14 remaining (grams) Half-life 1 1/2 5,700 2. 1/4 11.400 1/8…

A: After a half-life period, the mass of the reactant becomes half of the initial mass. So amount…

Q: Choose the appropriate drop-down to complete the paragraph. Gallium-67 has a half life of 78.1 hours…

A: lf life of Galium-67 = 78.1 hours lf life of Radium- 226= 1600 years

Q: 32) The charcoal from ashes found in a cave gave 3.34 14C counts per gram per minute. Wood from the…

A:

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: A piece of wood, reportedly from King Tut's tomb, was burned, and 7.32 g CO2 was collected. The…

A: In order to find the age of the sample we first write down the given data: Mass of CO2=7.32 g. Total…

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: days. Suppose the initial amount of Thorium-234 is 192.9 mg, find the amount of Thorium-234 remains…

A:

Q: A 450.0-mg sample of technetium-99m was used for a diagnostic test.  If technetium-99m has an…

A: Given - Initial amount=450.0mg Half life=4.8h Time=48h

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: A radioactive isotope has a half-life of 41.7 minutes. how long will it take for the radiation from…

A:

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

A:

Q: A radioactive isotope has a half-life of 24.5 minutes. how long will it take for the radiation from…

A:

Q: The half-life of Ga-67 is about three days. If only 12.5% of the original sample remains, the time…

A: The time at which reactant's amount is left half of the original amount is known as half-life. The…

Q: An archeological sample was predicted to be 9,415 years old. If the C-14 measured at present in the…

A:

Q: Solve the following problems and show complete solution. A. Half life of Sr90 is 29 years. What…

A: A.     Half life of Sr-90 ( t1/2) = 29 y           Let ' t '    =  100 y       n × t1/2   =  t…

Q: Consider a certain type of nucleus that has a half-life of 32 min. Calculate the percent of original…

A: Given: The half life, (t1/2)=32 min. The time of disintegration , (t)=1.9 hrs=(1.9*60)=114 min.…

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

A:

Q: The iodine-131 nuclide has a half-life of 8.0 days. If you originally have a sample containing 728-g…

A: Known: Half-life  = 8.0 days Original mass = 728 g Time elapsed = 6.86 weeks = (6.86 ×7)…

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: Tc-99m is the most commonly used radioactive isotope in medicine. It is a gamma emitter and has a…

A: The half life of Tc-99 is six hours. There will be two half lives involved in twelve hours. The…

Q: The half-life of carbon-14 is 5730 years. What does this statement mean? [A] It means that carbon-14…

A: Given: The half-life t12 of carbon-14 is 5730 years

Q: Complete the following equations with the correct particles and identify the mode of decay. (a) '0→…

A: Given,

Q: Which of the following radioactive isotopes is the most stable? The half-life of each isotope is…

A: Half life is defined as the time required to decay to half of its original amount.

Q: how many grams of tritium would you have in 37.5 years?

A:

Q: If the half-life of a radioactive substance is 4 days how much material will remain after 16 days if…

A:

Q: The cesium-131 nuclide has a half-life of 30 years. After 120 years, about 3 g remains. The original…

A:

Q: What percent of a parent isotope would remain after two half lives?  50% 25% 13% 66

A: Correct option is (b) 25%

Q: Tritium H-3 has a half-life of 12.3 years. If a sample of 3 g of H-3 is produced, what will be the…

A: Given: Amount of tritium taken originally=3g Half life=12.3 years Total time taken=24.6 years Mass…

Q: Germanium-66 Original amount: Amount left: 25 g Total time: 10 h Half-life: 2.5 h Number of…

A:

Q: Cobalt-60 is a beta emitter with a half life of 5.3 years. Approximately what fraction of cobalt-60…

A:

Q: Next step of the neptunium-237 decay series, very unstable francium-221 is produced. The half-life…

A: Given: Half-life of  francium-221 = 5.00 minutes Initial mass of francium-221 = 6.12 grams Time…

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

A: The solution is as

Q: 38.)In a cyclotron facility, 106 atoms of F-18 were created. The half-life of F-18 is 110 minutes.…

A:

Q: Technetium-99m is an important isotope used in medical imaging (the m stands for metastable).  Each…

A: The time required to reduce the concentration to half of the initial concentration of the substance…