Isotope X has a half-life of 71.8 years. If a sample initially contains 676. mg of X, what mass of X is present after 820. years?

Q: Phosphorus-32 is a radioisotope used in the treatment of leukemia and pancreatic cancer. If the…

A: Given, Phosphorus-32 in a sample decreases from 1.2g to 0.30g in 28 days . We have to calculate half…

Q: A sample of radioactive technetium-99 of half-life 6 hh is to be used in a clinical examination. The…

A: Given: Half-life of isotope = 6 hours. And the time passed = 15 hours.

Q: o-60 is used extensively in radiotherapy as a source of y-rays. Its half-life is 5.27 years. a) How…

A: Elements which are not stable gain stability by emitting rays, this type of elements are called…

Q: The half-life of cobalt is 5.3 years. How much of a 1.000- mg sample of cobalt-60 is left after 15.9…

A:

Q: The half-life of strontium-87 is 2.8 h. What percentage of this isotope will remain after 8 h and 24…

A: Radioactive decay is the breaking of unstable nuclei into stable ones by emitting radiation. These…

Q: The​ half-life of a radioactive substance is 50 years. If you start with some amount of this​…

A: Suppose we start with 1 gram of the sample. Therefore--- Initial amount (N0) = 1 g The half-life…

Q: The fraction of a radioactive isotope remaining at time t is (1/2)t/t1/2 where t1/2 is the…

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

Q: A sample of 400g of radioactive​ lead-210 decays to​ polonium-210 according to the function…

A: Given data : A sample of 400g of radioactive​ lead-210 decays to​ polonium-210. According to the…

Q: The isotope nickel-63 has a half-life of 100 years. If a tested sample has five grams of nickel-63…

A:

Q: Iodine-131 used to treat hyperthyroidism, has a half-life of 8.04 days. For a sample containing 10.0…

A: Half life time = 8.04 days  Initial mass = 10.0 μg  Time = 32.2 days Mass remain after 32.2 days = ?…

Q: 18° Re is used in the treatment of bone cancer. The half-life of 180 Re is 3.72 days. If you begin…

A: Given: Half-life of isotope = 3.72 days. The initial mass of isotope =1.76 µg And time passed = 18.6…

Q: The half-life of radioactive carbon ( 14C) is 5,370 years. If a sample of organic material contains…

A: Given that, The half-life of radioactive carbon ( 14C) is as given below --- t1/2 = 5,370 years The…

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

A:

Q: A radioactive substance decays at a rate proportional to the amount present. If 45 percent of a…

A: Given :   Time (t) = 20 years  Percentage of substance decays = 45 %

Q: If you start with a 13.16 g sample of Pt197which has a half-life of 19.89 hours, what is the mass of…

A:

Q: A radioactive element has a half-life of 1.1 hours. How many hours will it take for the number of…

A:

Q: If 28.0% of a sample of silver-112 decays in 1.52 hours, what is the half-life of this isotope (in…

A: Given values,      28% sample of silver=112 decays in 1.52 hours      that means 72% sample…

Q: Iodine-131 is used in the diagnosis and treatment of thyroid disease and has a half-life of 8.0…

A: The half-life of any radioactive element is the time in which it has been consumed half of its…

Q: If 28.0% of a sample of erbium-165 decays in 4.74 hours, what is the half-life of this isotope (in…

A: Half life period of a reaction:-   The time during which the concentration of a reactant is Reduced…

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

A:

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

A:

Q: The half-life of plutonium-239 is 24,110 years. If an original sample is 100. grams, how much…

A:

Q: In medical application prior to having an MRI, a patient will be administered a dye containing a…

A:

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

A:

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

A: Given half life = 8.04 days time = 12.7 days initial mass = 31.1 mg

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

A: Half-life of Cs-137 and initial mass, from which amount of Cs-137 left after 90.6 years.

Q: The half life of the radioactive element ubtonium-31 is 10 seconds. If 80 grams of unobtanium-31 are…

A:

Q: A nuclear power plant emits into the atmosphere a very small amount of krypton-85, a radioactive…

A: Given: Half life (t1/2) = 10.76 years  Total time (T) = 25 years

Q: How long does it take for 90% of a given quantity of the radioactive element cobalt – 60 to decay,…

A:

Q: A rock is analyzed in the laboratory for radiometric dating and found to contain 1/8 parent atoms…

A: Any process that occurs by radioactive decay follows first-order kinetics. The equation used to…

Q: plutonium 239 produced in breeder reactors has a half-life of 24100 years how long will it take for…

A: Answer: Time for 10% decay of Pu-239 is 3665.175 years

Q: If a tree dies and the trunk remains undisturbed for 1.170 × 10' years, what percentage of the…

A: This is a first order reaction. t½ = 0.693 ÷ k 5730 = 0.693 ÷ k k = 1.21 × 10-4  year-1 where k is…

Q: Phosphorus-32 is a commonly used radioactive nuclide in biochemical research, particularly in…

A: Given: Mass of Na332PO4 = 175 mg = 0.175 g                                       (Since 1 g = 1000…

Q: The half-life of Palladium-100 is 4 days. After 20 days a sample of Palladium-100 has been reduced…

A:

Q: mass of phosphorus-32,

A:

Q: Phosphorus-32 is a commonly used radioactive nuclide in biochemical research, particularly in…

A: The loss of elementary particles from an unstable nucleus results in the transformation of the…

Q: If 28.0% of a sample of copper-64 decays in 6.16 hours, what is the half-life of this isotope (in…

A: We will use formula of rate constant first order kinetics

Q: Strontium-90 (90Sr) is a radioactive isotope with a half-life of 28.8 years. What percentage of this…

A: The radioactive disintegration falls in the type of first-order kinetics where reaction rate…

Q: Strontium-90 is one of the products of the fission of uranium-235. This strontium isotope is…

A:

Q: If 28.0% of a sample of technetium-99 decays in 2.84 hours, what is the half-life of this isotope…

A:

Q: Radioactive phosphorus-32 decays with a half-life of 14.0 days. A chemist obtains a fresh sample of…

A: We have to calculate the number of days chemist have to do the experiment.

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

A:

Q: Iodine-131 is a radioactive isotope. After 2.00 days, 84.2% of a sample of 13I remains. What is the…

A: Iodine- 131 is an radioactive isotope. Time = 2 days Final concentration of 131l  = 84.2% of sample…

Q: The half-life of carbon-14, an isotope used in archaeological dating, is 5730 years. What percentage…

A: The age of the sample follows first order kinetics. This method is known as carbon dating. First…

Q: The half life of radium-226, the first radioactive element discovered, is 1,620 years. If a sample…

A: Radioactive reactions are of first order. The relationship between half life t1/2 and rate constant…

Q: Phosphorus-32 is a commonly used radioactive nuclide in biochemical research, particularly in…

A: Mass of  Na₃³²PO₄ = 175 mg  Time of decay t = 54.6 days half life of P-32 = 14.3 days We need to…

Q: The half-life of Strontium-85 is 65 days. How much of a 80. mg sample is left after 260 days? mg

A: Given: Initial mass of sample = 80 mg  Time passed = 260 days. And the half-life of isotope = 65…

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.