100 grams of an isotope with a half-life of 36.0 hours is present at start. How much time will have elapsed when 5.00 grams remains?

Q: 2. A sample of iodine-126 with an original mass of 15.00 mg loses 13.125 mg of the original mass of…

A: When the quantity is reduced to one-half of the original of a radioactive sample, then the time…

Q: A chemist wishing to do an experiment requiring Ca+ (half-life = 4.5 days) needs 3.0 µg of the…

A:

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

A: Given details, t1/2 = 3.8 days t = 5.5 days m0 = 1.55 g To calculate the mass of the isotope. By…

Q: . A radioactive isotope has a half-life of 10 years. What fraction of the original mass will remain…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: If sample made up of Glunitie 142 with a half life of 7 days contained 93.75% daughter atoms, how…

A: The question is based on the concept of chemical kinetics. we have to calculate the age of the given…

Q: An artifact is found that has 33% of the 14C it had when it was living. How long ago was this…

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Q: 40K decays to 40Ar with a half life of 1.27x10^9 years. What is the age of a rock in which the…

A: Recall the expression of remaining amount due to radioactive disintegration Remaining amountA=A∘2nSo…

Q: Define the term Nuclear Transmutations?

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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: 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: If we start with 1000 radioactive parent atoms and a half-life of 50 years. How many parent atoms…

A: Given,  Initial concentration = 1000 atoms       t12 = 50 years   To find = concentration after 200…

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 45.91 mg sample of a pure radioisotope has a half-life of 52 days, what will be the mass of the…

A: Given 45.91 mg sample of a pure radioisotope has a half-life of 52 day mass of the original…

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: 2. If you started with a sample of 600 radioactive nuclei, how many would remain undecayed after 3…

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Q: A sample of technetium-99m with a mass of 4.61 ng will have decayed to how much of this radionuclide…

A:

Q: 1.Element F has a quarter life of 10 hrs. If there are 925 milligrams remaining of element F after…

A: SOLUTION: A = AoE-KT  (First order reaction) Quarter life = 10Hours At quarter life A=3Ao/4 3Ao/4 =…

Q: Find the nuclear binding energy of potassium-40 (atomic mass= 39.9632591 amu) in units of joules per…

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

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

A: Radium-226 is a radioactive element. Here 24 g of the radium sample undergoes radioactive decay. The…

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

A:

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

A:

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: Compute the binding energy of the 7Li nucleus; the experimentally determined mass of 7Li is 7.016004…

A:

Q: 26. Four hundred grams of a radioactive substance decays to 50.0 grams. If it has a half-life of…

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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: 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 that,Initial amount of sample = 1.55gHalf life time = 3.8 daysTime = 5.5 days

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: Certain radioactive isotope has a half-life of 3.9 minutes. If we initially have 7168 grams of this…

A: According to the question, we have: Half life of radioactive isotope = 3.9 minutes.  Initial mass =…

Q: A sample contains 9,000 particles of the original isotope for every 63,000 particles of the daughter…

A: Given data : Half-life of the original isotope (t1/2) = 19 years Also given that, the sample…

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

A:

Q: The half-life of Zn-71 is 2.4 minutes. If one had 100.0g at the beginning, how many grams would be…

A:

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

A:

Q: . A radioactive parent isotope with 600 atoms. After the decay, 450 daughter atoms were produced.…

A:

Q: The half-life of carbon-14 is 5730 years. The wrapping of an Egyptian mummy gave off 3.8 counts per…

A: From the given data we haveHalf life of carbon-14=5730 yearsWrapping of mummy=3.8…

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: How old is this Martian Rock that is found to be containing 12.5% of a radioactive parent nucleus?…

A: On going from Martian Rock sample containing 100% of the Radioactive nucleus, to 25% of the…

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

A:

Q: Given 100.0 grams of a sample that has a half life of 3.67 days, determine the time in days for…

A: Given,  Initial mass of the sample  = 100 g  Final mass of the sample = 7 g  Half-life, t1/2 = 3.67…

Q: A specimen of charcoal found contains 57% as much 14C as a sample of present day charcoal. What is…

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

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: Sr-90 has a half-life of 28.8 years. Beginning with 15.0 of Sr-90, how much will remain after 145…

A: Determination of rate constant, K:

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

A: 1) calculate what decimal fraction of C-14 will be remaining: 11 / 15.2 = 0.72 2) calculate…

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: 1. Gold-191 has a half life of 12.4 hours. What mass of this isotope would remain after 49.6 hours…

A: