1. Tritium decays by a first order process that has a half-life of 12.5 y.  How many years will it take to reduce the radioactivity of a tritium sample to 15% of its original value? Assume the initial concentration is 1 mol/L.   2. A zero order reaction has a rate constant k = 0.025 mol/L/s for the disappearance of reactant A.  (a)What is the half-life of this process? (b)What will be the concentration of A after 15 s if the initial concentration is 0.50 mol/L?

Q: The first-order radioactive decay of iodine-131 exhibits a rate constant of 0.138 d−1. What is the…

A: Like chemical reactions, nuclear reactions are type of chemical reaction only but here in place of…

Q: Americium-241 is used in smoke detectors. It has a first order rate constant for radioactive decay…

A: Half-life of americium-241 is 432.2 years Therefore, time = 3×432.2 years = 1296.7 years

Q: A chemical engineer is studying the rate of this reaction. NH,OH (aq) → NH3 (aq)+H20 (aq) He fills a…

A: The half life and the rate constant for the given reaction are to be determined. The concentration…

Q: The Hydrogen isotope, tritium, is radioactive and has a half-life of 12.5 years. What percentage of…

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Q: Scientists working in Lake Istokpoga calculating half-lives of pollutants called volatile organic…

A: The half life (t1/2) of zero order reaction is given by the formula  t1/2 = [R]o / 2K [R]o = Initial…

Q: 2) The radioactive decay of 14C is a first order process with a half life of 5730 years. If the…

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Q: Radioactive decay is a first order process. If the half-life of 222Rn is 3.8 days, approximately how…

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Q: 6) Radioactive substances decay by first-order kinetics. How many years would be required for a…

A: By using the formula for First order kinetics we can solve this problem.

Q: 4. (a) The radioactive isotope 32P has a half-life of 14.3 days. If a sample contains 0.884 g of…

A: Half life of P-32 isotope = 14.3 days = 1235520 sec 22 days = 1900800 seconds

Q: The radioactive decay follows first-order rate law and for the radioisotope, Sr-90. its half-life…

A: Given: t12=28 years% of sample decompoed=87.5% To find Time for sample to decompose

Q: Iodic Table Environmental scientists calculating pollutant half-lives often define a transport rate…

A: Rate of a reaction determines the speed with which a reaction proceeds. First order reaction is a…

Q: Radioactive gold-198 is used in the diagnosis of liver problems. The half-life of this isotope is…

A: Radioactive disintegration reactions are first order reactions. Half life of first order reaction is…

Q: The rate constant for the decay of a radioactive element is 1.88 x 103 day1. What is the half-life…

A: Given that the decay constant of radioactive element is 1.88×10-3 day-1 To determine the half-life…

Q: It has been suggested that strontium-90 (generated by nuclear testing) deposited in the hot desert…

A: The kinetic energy possessed in the molecules is useful in breaking bonds due to the molecular…

Q: The half-life of radium-226 is 1.60x103 yr. How many hours will it take for a 5.00-g sample to decay…

A: Given: Initial mass of radium = 5.00 g Final mass of radium remaining = 0.185 g And half life of…

Q: A substance undergoes first-order decomposition. After 36 min at 500°C, only 12.5% of the original…

A: When a substance remains only 50℅ in a period, that period is known as the half-life of that…

Q: A new element is discovered. It decomposes at rate = k[X]^3 If the half life is 4 hours and the…

A: Given If the half life is 4 hours and the concentration is 16 micromolar, what is the rate constant…

Q: The rate constant for the decay of a radioactive element is 2.44 x 10 ^-3 day^-1. What is the…

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Q: he half-life for the radioactive decay of C-14C-14 is 5730 years. a) How long will it take for 25 %…

A: Radioactive decay is a spontaneous break down of an atomic nucleus, it follows first order kinetics…

Q: cientists working in Lake Tohopekaliga calculating half-lives of pollutants called volatile organic…

A: Given: The half-life of the process = 13.0 days. The concentration of the pollutant = 0.640 M It is…

Q: The decomposition of ethane, C2H6, to methyl radicals has a rate constant of 5.36 x 104 per second…

A:

Q: 6. A reaction believed to be either first or second order has a half-life of 20s at the beginning of…

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Q: Iodine-131 is a radioactive isotope that is used to diagnose and treat some forms of thyroid cancer.…

A: The give radioactive decay is of first order with rate constant of 0.138 d-1 To find the time…

Q: Given the following data, determine the order of the reaction with respect to Cl,.

A: Let us consider  Rate = K[NO]m[Cl2]n Here ,m is order with respect to NO      And n is the order…

Q: Tritium is radioactive and decays by a first order process with a half-life of 12.5 yr. If an…

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Q: Scientists working in Lake Kissimmee calculating half-lives of pollutants called volatile organic…

A:

Q: What is the integrated rate law for this decay process? The decay of radioactive copper-64 follows…

A: Given: The kinetics follow first-order. And the half-life = 12.8 hours.

Q: How many half-lives will it take for the concentration of the N20 to reach 50.00 % of its original…

A: decomposition of N2O is first order reaction  for first order reaction , we can write  N = N0 / 2n…

Q: 22. The half life of a first order reaction is 1 year. What is the time taken for 75% of the…

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Q: The half-life for the radioactive decay of C-14 is 5730 years and is independent of the initial…

A: According to the given information, the half-life is independent of the initial concentration and…

Q: 3) This problem involves the first order decomposition of the nuclei of an unknown element. a) What…

A: If a nuclei is unstable then it decomposes to reach stability.  Activation energy can be calculated…

Q: What is the first order rate constant for ²⁴⁰Pu?

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Q: The isotope Carbon-14 follows the decay rule C'(t)=kC(t) where C(t) is in grams, t is in years, and…

A: Radioactive decays follow first-order kinetics.

Q: Since radioactive decay is a first-order process, the decay rate for a particular nuclide is…

A: Molar mass of KCl = 74.55 g /mole Mass of KCl = 1 g Moles of KCl = MassMolar mass=1 g74.55…

Q: What is the half-life for the first-order decay of phosphorus-32? (P – decay is 4.85 x 10-2 day¬!.…

A: Given- Rate constant for the decay, k = 4.85 × 10-2 day-1Order of reaction = 1st order To find- The…

Q: Americium-241 is used in smoke detectors. It has a first order rate constant for radioactive decay…

A: Given: Rate constant k = 0.011 day-1 Initial concentration = 1.00 mg

Q: Radioactive gold-198 is used in the diagnosis of liver problems. The half-life of the isotope is 2.7…

A:

Q: The radioactive isotope 32P has a half-life of 14.3 days. If a sample contains 0.884 g of 32P, what…

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

Q: 3. The rate constant for the reaction of A₂ → 2A is 5.72 x 10⁰ a. If the initial concentration of A₂…

A:

Q: 0.1 M of a material has a decomposition rate constant (k) of 2.46×105 M-1 s-1. What equation would…

A: Given, [A]o = 0.1 M  K = 2.46 x 105 M-1 S-1  Formula used : t1/2 = 1/K [A]o

Q: 5. The half-life of 4Po is 0.16 s. How long would it take to reduce a sample of it to the negligible…

A: In a chemical reaction, the half-life (t 1/2) of a species is the time it takes for the…

Q: Radioactive gold-198 is used in the diagnosis of liver problems. The half-life of this isotope is…

A:

Q: Using time units of hours, what would the units for K be for a reaction that is 1 1/2 order?

A: The explanation is given below-

Q: 37.  What is the half-life for the first-order decay of carbon-14? (614C⟶714N+e−) The rate constant…

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Q: The half-life of the radioactive isotope phosphorus-32 is 14.3 days how many days required to…

A: We have given that  t1/2 = 14.3 days  And the radioactive phosphorus-32  undergo 75%  decay

Q: O3Ni decays by a first-order process via the emission of a beta particle. The 63NI isotope has a…

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Q: Radioactive Decay is a first order process. In 1911 , maria curie prepared a n international…

A: Radioactive Decay is a first order process. In 1911, Maria curie prepared an international…

Q: A substance undergoes first-order decomposition. After 53 min at 500°C, only 12.5% of the original…

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Photochemistry

Photochemistry is the part of chemistry that studies the various mechanisms of reactions that are triggered by the presence of light energy. It also helps to study the changes involved in a molecule that can undergo the absorption of radiation.