The half-life of 90Sr is 28 years. How long will it take for a given sample of 9°Sr to be 83% decomposed?

Q: Suppose that X is being consumed at a rate of 1.450 M/s . What is the rate of formation of Z?

A: Given- -∆[X]/∆t=1.450M/s Rate of formation of Z=?

Q: The decay of radioactive copper-64 follows first order kinetics with a half-life of 12.8 hours. a)…

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Q: Phosphorus-32 has a half-life of 14.3 days. What is the first-order rate constant for the decay of…

A: Chemical kinetics is the branch of chemistry that mainly deals with the rate of reaction and change…

Q: y= -4,292.37 x + 14.326 What is the Activation Energy (in Joules/mol) for this reaction at 30 oC?…

A: Given Data :

Q: A substance undergoes first-order decomposition. After 45 min at 500°C, only 12.5% of the original…

A: A substance undergoes first order reaction.  Time = 45 min  Temperature = 500 °C  Original sample…

Q: 1. Tritium decays by a first order process that has a half-life of 12.5 y.  How many years will it…

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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: Consider a radio active material with a half-life time of 30 years following first order reaction.…

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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: A substance undergoes first-order decomposition. After 28 min at 500°C, only 12.5% of the original…

A: The given information is as follows: The original sample, A∘= 100 % The sample left after 28…

Q: 1. Deoxyglucose labeled with 18F is commonly used in PET scan to locate tumors. The half-life of 18F…

A: In this question, we want to determine the time for the level of 18F in the body when it's drop from…

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: 140Ba decays via first-order kinetics (as do all radioactive isotopes) and has a half-life of 12.75…

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Q: What is the half life for the first order decay of phosphorus-32? The rate constant for the decay is…

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Q: At t = 0s, you have a pure sample of an unknown substance. At t = 28 s, 36.8% of the substance…

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Q: he decomposition of N₂O on a platinum surface has a rate constant, k = 1.48 x 10-3 M s-1. 2 N₂O (g)…

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Q: A substance undergoes first-order decomposition. After 32 min at 500°C, only 12.5% of the original…

A: Using formula of 1st order reaction: Kt = 2.303log A°/A  K = .693/t1/2

Q: The radioisotope 32Pdecays by 1st-order kinetics and has a half-life of 14.3 days. How long does it…

A: The answer is given as follows

Q: By what factor does the fraction of collisions with energy equal to or greater than activation…

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Q: A sample of sodium-24 chloride contains 0.050 mg of Na-24. After 20.5 h, 0.019 mg of Na-24 is left.…

A: Sodium-24 is radioactive isotope of sodium-23  All radioactive reaction are first order reaction…

Q: For the first order process: A → B The half-life of A is 62.1 seconds.  If a sample of A initially…

A: Given that : First order reaction, A → B Half life t12 = 62.1 seconds Mass of A (N∘)= 250g  Time (t)…

Q: (c) A new radioactive element, Fitzgeraldium, is discovered. After 2 days, 80% of a sample of…

A: The radioactive active decay follows first order kinetics. Let the initial number of nuclei be A0…

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: half-life of the decomposition

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Q: A first order decomposition reaction has a half-life of 60.1 yr. What percentage of the original…

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

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Q: A radioisotope of technetium is useful in medical imagingtechniques. A sample initially contains…

A: The rate constant for the decay is calculated as shown below where [A]o is the initial amount and…

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: What is the half-life (in y) for the first-order decay of argon-39? 3918Ar → 3919K + e− The rate…

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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: A given compound decomposes with a half-life of 8.0 s and the half-life is independent of the…

A: We have to calculate the time taken.

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

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Q: A certain signal molecule S in brain tissue is degraded by two different biochemical pathways: when…

A: Half life is the time taken for a radioactive material to decay to half of its initial size.

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

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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: 146Pm decays via first-order kinetics (as do all radioactive isotopes) and has a half-life of 5.53…

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Q: 11.What is a reaction for which half-life would be applicable? a.14/6C→14/7N+0/−1e…

A: option a first option is the answer half life for radioactive C14 is applicable in this reaction…

Q: If the half life of hydrogen peroxide is 949 sec and you started with 3M H2O2, how much hydrogen…

A: The decomposition of H2O2 in aqueous solution follows first order reaction kinetics. When rate of a…

Q: A substance undergoes first-order decomposition. After 45 min at 500°C, only 12.5% of the original…

A: N = No e-kt N = Number of nuclei present at time t N0 = Original number of nuclei k = decay constant…

Q: half-life

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Q: A substance undergoes first-order decomposition. After 37 min at 500°C, only 12.5% of the original…

A: The integrated rate equation for first order reaction is  k = 2.303tlog[R]o[R] k = rate constant t =…

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: The half-life period of two samples are 0.1 and 0.4 seconds. Their initialConcentrations are 200 and…

A: The amount of time required by a sample to reduce its initial concentration by half is termed as…

Q: The half-life for the radioactive decay of U-238 is 4.5 billion years and is independent of initial…

A: Radio-active decay follows first order kinetics. The integrated rate equation for the first order…

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

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Q: Use the following information to calculate the rate constant of burning rocket fuel at 175 °C. rate…

A: The Given for burning rocket fuel.

Q: The rate law describing the decay of a given isotope (Q) is: rate = 0.218 hr-1 [Q] What is the…

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Q: In an experiment, a sample of NaClO3 was 90% decomposed in 48 min. Approximately how long would this…

A: Given: Time taken for 90% decomposition = 48 min. Temperature =20°C To find: The time taken for the…