15. A mammoth skeleton has a carbon-14 decay rate of 0.48 disintegrations per minute per gram (0.48 dis/min g). How long has the mammoth been dead? Living organisms have a carbon-14 decay rate of 15.3 dis/min g and carbon-14 has a half-life of 5730 years.

Q: An animal skeleton has a carbon-14 decay rate of 11.1 disintegrations per minute per gram of carbon.…

A: given: carbon-14 has a half-life = 5730 yrs  carbon-14 decay rate = 11.1 disintegrations carbon-14…

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

A: Given Half life (t1/2) = 78.2 hours Initial amount (N0) = 45.7mg  Time (t) = 193 hours Radioactive…

Q: Bandages can be sterilized by exposure to gamma radiation from cobalt-60, which has ahalf-life of…

A: Given: The mass of the sample is 5.27 Y. The half-life of cobalt-60 is 5.27 y.

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

A:

Q: In addition to C-14, K-40 is often used for archeological dating. K-40 decays to Ar- 40 by positron…

A: The rate of radioactive decay has been proven to be of first order kinetics. Using the understanding…

Q: CHAPTER TEN RATES OF REACTIONS AND FACTORS AFFECTING IT The half-life of bismuth-212 is 1 hour. If…

A:

Q: Sodium-24, which is used to locate blood clots in the human circulatory system, has a half-life of…

A: Half life period: The time required to decay half of the initial amount is known as half life…

Q: A bone has a carbon-14 decay rate of 4.85 disintegrations per minute per gram of carbon. If a living…

A: Given : Decay rate of carbon-14 in bone = 4.85 disintegration per minute per gram of carbon Decay…

Q: Fluorine-18, which has a physical half-life of 110 min, is used in PET scans. if 1.00g of…

A: The fluorine-18 sample was shipped at 5:00 PM and arrives the laboratory at 9:30 AM in the next…

Q: The half-life of a certain radioactive isotope is 20 days. How long does it take for 50g of the…

A:

Q: The carbon-14 decay rate of a sample obtained from a young tree is 0.256 disintegration per second…

A: Decay process is a first order reaction. Therefore we have to put the integrated rate law for first…

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

A:

Q: An ancient skull has a carbon-14 decay rate of 0.75 disintegrations per minute. The living organisms…

A: Chemical changes in which amount of species taken varies or changes linearly with time are said to…

Q: The half-life of Ga-67 is 77.9 hours. How long will it take Ga-67 to decay and lose 95% of its…

A: Radioactive decay follows first order kinetics. k = 0.693/t0.5 = 0.693/77.9 hour^-1 = 0.008896…

Q: lodine-131 is used in the treatment of tumors in the thyroid gland. Its half-life is 8.1 days.…

A:

Q: Radioactive cobalt-56 decays with a half-life of 77.2 days. a. What is the value of k in s12 k = b.…

A: Radioactive disintegrations always happen as per first-order kinetics in which reaction rate for…

Q: Barium−131 is a radioisotope used to study bone formation. A patient ingested barium−131. How much…

A: The time in which half of the initial amount of the reactants convert into the product known as half…

Q: Yttrium-90 is a radioactive isotope used to treat tumors in the liver. 90 Y has a half-life of 2.67…

A: Given : Half life of 90Y = 2.67 days. And mass of 90Y remaining after 1.03 days = 4.02 µg

Q: What is the age of a fossil that has a carbon-14 decay rate of 6.5 disintegrations per minute per g…

A: Formula used y=a e-nt where y is the final  amount of death = 6.5dis/min           x is the initial…

Q: 17. If it takes 12 half-lives for a radioactive chemical (k = 4.85 x 10-2 day¹) to decay to a level…

A: Half-life is the time taken for half of the radioactive atoms of a specific radionuclide to decay

Q: 90Sr is an isotope produced from atmospheric testing of nuclear bombs. If nuclear testing was…

A: Half  life = 28.5 years

Q: Americium-241 is a radioactive isotope that is used in smoke detectors. It has a half-life of 432.2…

A:

Q: One of the radioactive isotopes used in chemical and medical research is iodine-125, which has a…

A: Given Half life of I-125 = 61 days [I-25]t = 0.25 g[I-25]0 = 1 gNow As we know radioactive decay is…

Q: Radium-226 is radioactive and has a half life of 1600. years. How long would it take a sample to…

A: The emission of energy in the form of the ionizing radiation is called radio decay.This radiation…

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

A: Since the decay reactions are first order reactions always hence for the first order reaction we can…

Q: A sample of sodium thiosulfate, Na2sO3 , contains sulfur-35. Determine the mass of 35S in the sample…

A:

Q: A scientist is taking measurements on an unknown isotope to determine its half life. If the…

A: Radioactive decay is followed first order kinetics  Decay constant                  λ =2.303t…

Q: Radioactive vanadium-48 decays with a half-life of 16.0 days. a. What is the value of k ins? b. A…

A: Radioactive decay is a spontaneous process. Radioactive decay is a first order reaction. Thus its…

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

A: Given Half life of Radon -222 ( t1/2 )  = 3.82 days  Initial amount of isotope ( A0 )= 33.5 mg  Time…

Q: (Q114) A meteorite recovered from a meteor landing site in the Australian outback contains 0.438 g…

A: we have to calculate the age of meteorite

Q: Technetium‑99m, an important radionuclide in medicine, has a half‑life of 6.0 hours. What percentage…

A: Using concept of half life time.

Q: The half-life of Ga-67 is 77.9 hours. How long will it take Ga-67 to decay and lose 95% of its…

A:

Q: chemist determines that a sample of petrified wood has a decay rate of 6.00 counts/minute-gram. What…

A:

Q: Phosphorus-32 is a radioisotope used to detect certain types of tumors. P-32 has an effective…

A: Phosphorus-32 is a radioisotope used to detect certain types of tumours. P-32 has an effective…

Q: Radioactive tungsten-178 decays with a half-life of 21.6 days. (a) What is the value of k in s"17…

A: Answer-a Relation between half life and decay constant is: λ=0.693t1/2 value of half life given is…

Q: Copper(II) acetate containing copper-64 is commonly used to study brain tumors. This isotope has a…

A: The half-life of an isotope is defined as the time required for a quantity to reduce into half. It…

Q: How many half-lives have passed in each of the following situations? How much of a 48.0 g…

A: 1. The given half life of iodine-134 is 50 minutes. The total number of half-lives observed in 150…

Q: 3. 137Cs has a half-life of 30.2 years. How many years will it take for a 100.0-g sample to decay to…

A:

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

A:

Q: how much will remain after 12.0 days?

A:

Q: Chromium-51 nuclide is used in studies to evaluate the lifespan of red blood cells and bone marrow…

A: Chromium-51 is a commonly used radionuclide with a half-life of 27.7 days, emitting gamma rays with…

Q: 1) P-32 has a half-life of 14.3 days. How many milligrams of phosphorus-32 remain after 57.2 days if…

A: Half-life = 14.3days Initial mass = 4.0mg You will be left with half of initial mass after 14.3 days…

Q: A sample of bone is subjected to radiocarbon dating. The current decay rate observed for its…

A:

Q: A bone has a carbon-14 decay rate of 4.98 disintegrations per minute per gram of carbon. If a living…

A: Solution : N0= 4.98 dpm N(t) = 15.3 dpm  t1/2 = 5715 years  t = ?

Q: One of the radioactive isotopes used in chemical and medical research is iodine- 125, which has a…

A: Given -  Half life of iodine = 61 days  Initial concentration of iodine (No) - 1 g After time t…