concentration of theophylline in a patient's body decreased from 8.0 x 10¬4 M to 4.0 x 10¬ª M in 24 hours. In another 12 hours the drug concentration was found be 2.0 × 10¬ª M. What is the value of the rate constant for the metabolism of this drug in the body? Rate constant = mol/L · h

Q: The activation energy, Ea, for a particular reaction is 19.4 kJ/mol. If the rate constant at 80 °C…

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Q: which has a rate constant, k = 2.95 X 103 s. What percent of A remains after 150 s ?

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Q: How many half-lives are required for the concentration of reactant to decrease to 1.56% of its…

A: Given data ;  Concentration is decreased to 1.56 %. It means that 0.0156 of [A0] is decomposed.…

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

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

Q: A substance decomposes with a rate constant of 9.05 × 10⁻⁴ s⁻¹. How long does it take for 15.0% of…

A: Rate constant is 9.05×10-4 s-1 Let consider Initial concentration = 100 M Final concentration = 100…

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A: The given data are tabulated as follows, The question is asked for graphing the data and to find…

Q: What is the concentration of a reactant after 23.5 s if the initial concentration is 0.150 M and the…

A: Given   The first-order rate constant is 5.4×10-2 s-1. Initial concentration is 0.150 M. Time is…

Q: For a given reaction, the rate constant triples when the temperature is increased from 32 °C to 71…

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Q: The rate constant of a reaction is 3.15 ×10−5 L/mol·s at 195°C and 2.45 × 10−3 L/mol·s at 258°C.…

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Q: Hydrogen peroxide decomposes with a rate constant of 1.8 x 10-5 s-1. How much of the reactant will…

A: The rate constant k is given as 1.8×10-5s-1 initial concentration of reactant = 0.64 M We have to…

Q: 3. A midnight dumper discharged a tank truck full of industrial waste in a gravel pit. The truck was…

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Q: At 28 °C, raw milk sours in 4.0 h but takes 48 h to sour in a refrigerator at 5 °C. Estimate the…

A: Activation energy (Ea) is the minimum energy required for the occurrence of a chemical reaction.…

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A: Catalyst is the one that speeds up a chemical reaction by lowering activation energy of reaction.…

Q: The activation energy, Ea, for a particular reaction is 13.6 kJ/mol. If the rate constant at 754 °C…

A:

Q: On which of the following properties does the rate constant of a reaction depend? (a) reactant…

A: Since you have posted multiple questions, the answer for first question is given below. Kindly…

Q: What is the concentration of a reactant after 22.0 s if the initial concentration is 0.150 M and the…

A: Given, t =22.0 secInitial concentration =0.150M =[A]O rate constant =5.4×10-2  S-1 =K

Q: The activation energy, Ea, for a particular reaction is 19.4 kJ/ mol. If the rate constant at 80 °C…

A:

Q: The time elapsed is 474 min. What is the value of the rate constant, k? In([R]/[R]o) = -0.303 [R],…

A:

Q: A substance decomposes with a rate constant of 9.05 × 10⁻⁴ s⁻¹. How long does it take for 18.5% of…

A: When 18.5% of the substance decomposed then amount of substance left at time, t is [R] = [R]0 -…

Q: What is the concentration of a reactant after 20.5 s

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Q: 6. a) What is a catalyst? b) What is the difference between a homogeneous and a heterogeneous…

A: 6 a) Catalyst: A substance (in small amount) that increases the rate of a chemical reaction and do…

Q: The activation energy, Ea, for a particular reaction is 19.4 kJ/mol. If the rate constant at 80 °C…

A: Arrhenius equation: Arrhenius equation give the relationship between the activation energy and the…

Q: A second order reaction whose rate constant at 800 °C was found to be 5.0 x 10* L mol s' has an…

A: Given K1 = 5.0×10-3 L/mol.s T1 = 800°C T2 = 875°C Activation energy (Ea) = 45 kJ

Q: A substance decomposes with a rate constant of 9.05 × 10⁻⁴ s⁻¹. How long does it take for 14.0% of…

A: Given that ,  Rate constant (k) for decomposition reaction of a substance is 9.05 × 10⁻⁴ s⁻¹. Time…

Q: On which factor the rate constant of a reaction does not depend upon a) Temperature b) Activation…

A: Arehenuis  Equation  K= Ae-Ea/RT Raate constant depends upon temperature  and Activation energy.…

Q: Which of the following graphs of the rate constant (k) and the temperature would give a straight…

A: We will use arrhenious Equation for this plot of graph .

Q: A reaction has a rate constant of 1.27×10−4 s−1 at 28 Celsius and 0.234 s−1 at 79 Celsius. What is…

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Q: Consider the reaction : A+ 2B → 3C + 4D Suppose that at a particular moment during reaction, C is…

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Q: The enzyme fumarase catalyzes the formation of malate from fumarate, which is critical for cellular…

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Q: A substance decomposes with a rate constant of 9.05 × 10⁻⁴ s⁻¹. How long does it take for 25.5% of…

A: The given data contains, rate constant = 9.05×10-4s-1

Q: A substance decomposes with a rate constant of 9.05 x 10-4 s1. How long does it take for 12.5% of…

A: Given, Rate constant(K)=9.05×10-4s-1. Let the initial concentration of the substance =100%.…

Q: The rate law for your reaction is Rate= k[NO2]?. The rate constant for this reaction is 2.5 x 103/M…

A: 4) Given, Rate law for the reaction, Rate = k[NO2]2 From rate law we can say that this is a second…

Q: The rate constant for a particular reaction is 1.5 x 10-4 M¯'s-1 at 100 °C and 1.1 x 10~3 M¯'s at…

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Q: The activation energy, Ea, for a particular reaction is 13.6 kJ/mol. If the rate constant at 754 °C…

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Q: Define the term rate-determining step?

A: Chemical kinetics deals with the concept of the rate at which reaction occurs. It also gives the…

Q: Consider the hypothetical reaction 4A + 3B 2C + D A certain amount of A and B was placed in a…

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Q: A researcher raises the temperature from 39.4 to 56.2 o C and finds that the rate of the reaction…

A: Given that: T1 = 39.4 o C = 39.4+273 = 312.4 K T2 = 56.2 o C= 56.2+273 = 329.2 K initial rate = k1…

Q: Express the rate of reaction for the following chemical reaction Zn 2H,0 Zno + H2

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Q: 7.For a chemical reaction, the activation energy for the forward reaction is +181 kJ and the…

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Q: A substance decomposes with a rate constant of 9.05 × 10⁻⁴ s⁻¹. How long does it take for 23.0% of…

A: We have to find time for 23% decomposition

Q: Given that E, for a certain biological reaction is 56 kJ/mol and that the rate constant is 5 x 10-2…

A: Given: Activation energy (Ea) = 56 kJ/mol Rate constant (K1) = 5 × 10-2 s-1 Initial temperature (T1)…

Q: 15) Answer the following questions by looking at the graph below. A catalyzed chemical reaction 90…

A: Activation energy is the energy we need to provide such that reaction can initiate.  When a catalyst…

Q: 9. The rate of reaction can be expressed through_____ A. chenge in concentration in time over…

A: The rate of reaction can be expressed through what has to be given.

Q: In a series of experiments on the decomposition of dinitrogen pentoxide, N2O5, rate constants were…

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Q: substance decomposes with a rate constant of 9.05 × 10⁻⁴ s⁻¹. How long does it take for 24.5% of the…

A: Using basics of first order of reaction to calculate the time required.

Q: The activation energy, Ea, for a particular reaction is 13.6 kJ/mol. If the rate constant at 754 °C…

A: The relationship between rate constant and activation energy is given by  K = A e-Ea / RT  where K =…