What is half-life period of a reaction?

Q: Explain the following : (a) A lump of coal burns at moderate rate in air while coal dust burns…

A: Average rate of reaction is defined as ratio of change in concentration of reactant or product by…

Q: 10. Consider the reaction: Co - Ni + °e -1 This reaction has a half-life of 5.271 ycars. Supposc a…

A: 2760Co →2860Ni + -10e Nuclear disintegration follows first order kinetics  λ=2.303 log(A0/A)/t…

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

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Q: Determine the order of this reaction, the rate constant, and the first half life.

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Q: Niobium-89 decays through beta decay to produce yttrium-89 in a first order process with a half-life…

A: Half life time is a time to consume half of initial concentration of any reactant. Denoted by t1/2.…

Q: Overall Reaction: A = B [B] = [A] =• Time Reset

A: This is a chemical equilibrium graph in which quantity of  Reactant maximum while concentration of…

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

A: Rate constant is calculated using given half-life value:

Q: Both technetium-99 and thallium-201 are used to image heart muscle in patients with suspected heart…

A: The half-life and the final concentration of a reaction is related as:

Q: Radioactive decay is a first-order kinetic process. The half-life for the decay of plutonium-239 is…

A: Radioactive decay always follows first order kinetic process , so we have to use the formulas of…

Q: Consider 250g of iodine which decomposes at a rate proportional to the amount present. Around 150g…

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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: What percentage of reactant will remains after 120 s if the half-life is 60 s?

A: r the given reaction,Half life = 60 sec% of reactant remaining after 120 sec has to…

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: What is the half-life of this reaction at 65 °C?

A: Given data is  The decomposition of N2O5 is a first order reaction. The activation energy = 110…

Q: What is the half-life of this reaction at 1000°C?

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Q: How are the rate constant and the half-life related?

A: The rate constant and the half-life of various order reactions are, In the above equations, rate…

Q: 57. The half-life for the radioactive decay of U-238 is 4.5 billion years and is independent of…

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

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: 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: a) Express the rate of the reaction in terms of the change in concentration of each of the reactants…

A: Rate = -1/2 ∆[H2]/dt =-(0.067-1.00)/(40-0)*2 =0.0116625

Q: Compare the instantaneous rate, initial rate and average rate to each other. Which do you expect to…

A: The rate of reaction or the speed with which a chemical reaction takes place can be defined as the…

Q: "hat percentage of a material will persist after 60 minutes if it's half-life is 30 minutes? dium 24…

A: Given half life = 30 min  We have to find amount of substance left after 60 min

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: The half-life is the time it takes for a reactant to halve its concentration. The half-life whose…

A: The relationship between hal-life time and initial concentration of reactants is given by  t1/2 ∝…

Q: calculate the length of the next half-life.

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Q: Which of the following is/are TRUE regarding the half-life of any reaction? Group of answer choices…

A: Introduction :  The half life of a reaction can be defined as the time during which the…

Q: A reactant decomposes with a half-life of 179 s when its initial concentration is 0.3140 M. When the…

A: For the same reactant, the half life remains constant with decrease in concentration of the…

Q: the half-life 4 frost Ordes reaction De termine a

A: Half life of a first order reaction: It is defined as the time taken to half concentration of the…

Q: If the concentration of a product increases from 0.420 mol/L to 0.780 mol/L over a period of 1 hour…

A: Average rate = Change in concentration of the reactantchange in time  For a reaction,A →productsIt…

Q: Geologists can estimate the age of rocks by their uranium-238 content. The uranium is incorporated…

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Q: A particular reactant decomposes with a half-life of 123 s when its initial concentration is 0.380M.…

A: The given reaction’s half-life depends upon initial concentration. Hence, this reaction cannot be…

Q: A particular reactant decomposes with a half‑life of 151 s when its initial concentration is 0.385…

A: By hit and trail method assume that the given rection is of second order.  The rate constant value…

Q: The half-life for the radioactive decay of C-14C-14 is 5730 years. If a sample of C-14C-14…

A: For a radioactive decay rate constant K and half life t12 have the following relation. t12=0.693K…

Q: What is meant by the term elementary reaction?

A: The term elementary reaction has to be explained below,

Q: What is meant by the term rate determining step?

A: To find: The definition for rate determining step

Q: Calculate the half life when the rate is 6.2x10^-4

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Q: Calculate the average rate constant for the reaction.

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Q: Two gases .I' and I are found in the atmosphere in only trace amounts because they decompose…

A: Solutions  A)  yes B)  4.7 hours

Q: If there are 8.00 g of a reactant at the beginning of a reaction, what fraction remains after 3 half…

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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: cyclobutane can decompose to form ethylene write an expression for the rate of reaction in terms of…

A: The rate of a reaction helps in determining the rate at which the reaction will proceed. It also…

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: Radioactive materials are often used in biological studies. A radiation biologist studies the rate…

A: Radioactive decay follows the first order kinetics. According to the first order reaction : where k…