A first order reaction initially contains 3.95 x 10²⁰ molecules. If the reaction has a half-life of 20.0 minutes, how many molecules remain unreacted after 80.0 minutes?

Q: A particular reactant decomposes with a half-life of 159 s when its initial concentration is 0.288…

A: In a zero order reaction, half life is proportional to the initial concentration reactant. In a…

Q: A second order reaction has a half-life of 132.1 min. When the initial concentration of L is 0.00185…

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Q: Radioactive substances decay by first-order kinetics. How many days would be required for a sample…

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Q: A reactant decomposes with a half-life of 139 s when its initial concentration is 0.107 M. When the…

A: The objective of this question is to determine the order of the reaction and the value and unit of…

Q: A first order reaction initially contains 2.55 × 10²⁰ molecules. If the reaction has a half-life of…

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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: A first order reaction initially contains 3.10 × 10²⁰ molecules. If the reaction has a half-life of…

A: The half-life of the first-order reaction does not depend on the initial concentration of the…

Q: In the first-order decomposition of N2H4 at 740 K, it is found that 30.0% of a sample has decomposed…

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Q: Anthropologists can estimate the age of a bone or other sample of organic matter by its carbon-14…

A: Radioactive decay follows first-order kinetics. The decay constant (λ) and half-life of a substance…

Q: A first order reaction has a half-life of 829 seconds at 25oC. How long (in seconds) does it take…

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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: A certain first-order reaction has a half-life of 60.0 minutes. How much time is required for this…

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Q: A certain first-order reaction has a rate constant of 0.00950 1/min at 300 K. What is the half-life…

A: Half life is the time when the concentration of reactants becomes half.

Q: Match the half-life to the rate constant assuming that the initial conce k = 0.5 M/s k = 0.5/ (M s)…

A: A) k = 0.5 M/s From the unit of rate constant, it is zero order reaction.  half life = Ao/2k   =…

Q: The half life for a first order reaction is 45 min. What is the rate constant in units of s? Multple…

A: Note : Half life (t 1/2) = 0.693 / K . See below.

Q: 2)The reaction A(aq) ---> B(aq) + C(aq) is a reaction of order one. The half-life of A(aq) is 91.7 s…

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

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Q: The rate constant for this zero-order reaction is 0.0190 M · sl at 300 °C. A products How long (in…

A: For zero order reaction,   Where, [A]t = 0.940 M [A]0 = 0.290 M     k = 0.0190 M.s-1

Q: A reactant in a 1st order reaction will no longer be detectable once 99.5% of it has disappeared.…

A: The time taken for the reactant to reduce to its half concentration is known as half life of that…

Q: The first-order decomposition, A → products, has a rate constant of 0.0 Starting with [A], = 0.7 M,…

A: Given that rate constant = 0.02 s-1 [A0] = 0.7 M  [At] = 0.1 M

Q: 4. The decomposition of a certain element was observed over a period of 30 hours and the results…

A: The objective of the question is to determine the order of the reaction and the half-life of the…

Q: The decomposition of reactant R was studied, and the data given below was obtained at 100.0 °C: R →…

A: Half life of reaction is

Q: A first order reaction initially contains 1.00 × 10²⁰ molecules. If the reaction has a half-life of…

A: Since we know that the relationship between the amount of reactant i.e [A] and time for a first…

Q: The reaction A(aq) ---> B(aq) + C(aq) is a first order reaction. The half-life of A(aq) is 85.2 s at…

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Q: 14C dating works because the amount of 14C produced from nitrogen reacting with cosmic radiation and…

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Q: A first order reaction initially contains 2.65 × 10²⁰ molecules. If the reaction has a half-life of…

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Q: The overall reaction of hydroxide radical with nydrogen gas occurs as follows: DH(g) + H2(g) H20(g)…

A: Formula Arrhenius equation log (k1k2) = Ea2.303 R1T2-1T1 Where k1 = rate constant = 1.29×107 L/mol.s…

Q: Consider the following reaction: 3 Y(g) → 2 Z (g) The half life of this reaction is 12.16 days at…

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Q: A reactant decomposes with a half-life of 197s when its initial concentration is .279 M. When the…

A: The rate law of a chemical reaction gives the dependence of its rate on a rate constant "k" and the…

Q: Cesium-131 is the latest tool of nuclear medicine. It is used to treat malignant tumors by…

A: Given T1/2 = 9.7 days Initial concentration = 20 mg.

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

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Q: first order reaction initially contains 4.80 × 10²⁰ molecules. If the reaction has a half-life of…

A: For a first order reaction: Half-life = 0.693/rate constantAt = Aoe-kt Ao = initial concentrationAt…

Q: A first order reaction initially contains 2.10 × 10²⁰ molecules. If the reaction has a half-life of…

A: The half-life of a reaction is defined as the time required for the reactant concentration to…

Q: The OH radical reacts with itself in a disproportionation type reaction according to the reaction:…

A: we can predict the order of the reaction by seeing the unit of the rate constant of the reaction.…

Q: A first order reaction initially contains 4.65 × 10²⁰ molecules. If the reaction has a half-life of…

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