A number of reactions that take place on the surfaces of cata lysts are zeroth order in the reactant. One example is the decomposition of ammonia on hot tungsten. In one experiment. the partial pressure of ammonia decreased from21 kPa to 10 kPa in 770 s. (a) What is the rate constant for the zeroth-order reaction? (b) How long will it take for all the ammonia to disappear?

Q: The rate constant for the decomposition of H202 was determined to be 2.89×10¬2 s1. How long will it…

A:

Q: The half-life of a first-order reaction was found to be439 s; what is the rate constant for the…

A: First order reactions are the reactions in which rate of the reaction is dependent on concentration…

Q: For a second-order reaction, the rate constant is 6.7x102M-1s-1 at 45 degrees celsius and…

A: The relationship between rate constant and activation energy is given by  where K = rate constant…

Q: The enzyme urease catalyses the reaction in which urea is hydrolysed to ammonia and carbon dioxide.…

A: GIVEN: The half-life of urea in the pseudofirst-order reaction. temperature is lowered from 20 oC to…

Q: The half-life of a first-order reaction is found to be 28.25 min. a. What is the value of the rate…

A: a.

Q: The rate at which a certain drug is eliminated by the body follows first-order kinetics, with a half…

A: Given:Initial concentration = 1.1 μg/mLTime = 268 min

Q: How many half-lives are required to reduce the concentration of a first order reaction to 6.25% of…

A: Half life means (initial concentration /2) means 50% of initial concentration will be remained after…

Q: The reaction A + 2B → products was found to be first-order to A and second- order to B. Predict by…

A:

Q: 1) For the reaction: A-> products a) What is the rate of expression for the above chemical reaction…

A:

Q: Summarize the difference in the behavior of half-lives for first order vs. second-order reactions.

A: A half-life is calculated from the direct measurement concentration after it reduces to half of its…

Q: The rate at which a certain drug is eliminated by the body follows first-order kinetics, with a half…

A: The rate constant of the reaction can e calculated as follows-

Q: sucrose undergoes fermentation. If 10 M solution of sucrose is reduced to 5 M in 1 hours and to 2.5…

A:

Q: In a study of the rearrangement of ammonium cyanate to urea in aqueous solution at 50 °C…

A:

Q: What is the best way to ascertain that a reaction is first order?

A: if it the reaction is a first-order reaction, plot the natural logarithm of a reactant concentration…

Q: What is the half life (t1/2), in units of seconds,  for a first order reaction that has a k value of…

A: In the first-order reaction, the half-life will not be influenced by the concentration of the…

Q: The rate at which a certain drug is eliminated by the body follows first-order kinetics, with a half…

A:

Q: For a reaction with an activation energy of 139 kJ/mol, how much must the temperature be raised…

A: Given,  Activation energy = Ea = 139 KJ/mole  Rate constant (k1) = K at temperature = T1 = 273 + 25…

Q: The rate at which a certain drug is eliminated by the body follows first-order kinetics, with a half…

A:

Q: The rate at which a certain drug is eliminated by the body follows first-order kinetics, with a half…

A: According to first order kinetics- [A] = [A]° ekt

Q: Using the data in the table, determine the rate constant of the reaction and select the appropriate…

A:

Q: The enzyme urease catalyzes the reaction of urea,(NH2CONH2), with water to produce carbon dioxide…

A: a) The reaction taking place is as shown below NH2CONH2 + H2O    ------catalyst--------> 2 NH3 +…

Q: The activation energy for a reaction is changed from 184 kJ/mol to 59.0 kJ/mol at 600. K by the…

A: Activation energy (Ea) is changed from 184kJ/mol to 59.0kJ/mol Temperature = 600K Catalyzed reaction…

Q: A reaction is 50% complete in 44.9 minutes. How long after the start of the reaction will it be 75%…

A: For the zero order reaction rate = k that is rate constant. Zero order reaction is independent of…

Q: The activation energy for a particular reaction is 102 kJ/mol. If the rate constant is 1.35 x 10 s1…

A: The rate constant will be calculated by using integrated arrhenius equation. Rate constant of…

Q: The rate at which a certain drug is eliminated by the body follows first-order kinetics, with a half…

A: Given data: Half life = 68 minutes Concentration of the drug = 0.37 micro g/mL

Q: The rate constant for the enzyme-catalysed decomposition of hydrogen peroxide, H 20 2, increases by…

A: We have to calculate the activation energy.

Q: A first-order reaction has a rate constant k = 0.0815 s-1 at a temperature of 65oC and a rate…

A: To calculate activation energy of the reaction in kJ/mole with the given rate constant at different…

Q: What is pseudo first-order rate constant?

A: A Pseudo first-order reaction is defined as a second-order or bimolecular reaction that behaves like…

Q: What are the units of the rate constant for A + B → C whose rate law is first order in A and second…

A: The solution is as follows :

Q: E17B.1(b) In a study of the enzyme-catalysed oxidation of ethanol, the molar concentration of…

A: Given information:Initial concentration = 220 mmol.dm-3Final concentration = 56.0 mmol.dm-3Time =…

Q: The half-life of a first-order process a. Depends on the reactant concentration raised to the first…

A: The time required for decreases the concentration of reactant species by half  when compared to the…

Q: A second-order-reaction of the type A +2 B→ P was carried out in a solution that was initially 0.075…

A: Since you have asked multiple question, as per our company guidelines we are supposed to answer the…

Q: The rate at which a certain drug is eliminated by the body follows first-order kinetics, with a half…

A: Half life time = 44 min  Initial concentration = 0.47 μg /ml. Time = 132 min  Concentration after…

Q: The rate at which a certain drug is eliminated by the body follows first-order kinetics, with a half…

A: Half-life of reaction = 20 minutes

Q: The rate law for a reaction was reported as v= k,[A][B][C] with the molar concentrations in moles…

A: Rate law expresses that the rate of a reaction (v) is proportional to the rate constant, k and…

Q: The half-life for the zero order reaction A → Products is 276 s. What is the value of the rate…

A:

Q: the

A:

Q: Calculate the activation energy and constant A for a first order reaction in which the following…

A: Here we are required to find activation  energy and pre exponential factor for a  kinetic reaction

Q: The age of wine can be determined by measuring the trace amount of radioactive tritium, H, present…

A: Answer: Given data: N=0.191N0 Here: N0=initial quantity of tritium  N=Quantity of tritium at time t…

Q: What is the half-life of a first-order reaction which is 15% complete after 210 seconds?

A: Given, time to consume 15 % of reaction for first order = 210 sec we are asked to calculate the…

Q: (i) If half life period of first order reaction is x and 3/4 th life period of same reaction is ’y’,…

A: i) The half-life of a reaction is defined at the time during which the concentration of the reactant…

Q: The rate constant for the first-order conversion of A to B is 3.33 hr-1. How much time will be…

A: Given K(rate constant) = 3.33/hr Time required for reaching 75% of original value=?

Q: A certain second-order reaction (B→products) has a rate constant of 1.50×10−3 M−1⋅s−1 at 27 ∘C and…

A:

Q: You are studying the rate of the reaction 2A → B and have obtained measurements of the concentration…

A: The order of the reaction with respect to a particular reactant is determined by observing their…

Q: The reaction A + 2B → products was found to be first-order to A and second- order to B. Predict by…

A:

Q: The rate at which a certain drug is eliminated by the body follows first-order kinetics, with a half…

A:

Q: The activation energy for the decomposition of hydrogen peroxide is 46.00 kJ/mol. When the reaction…

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: Given the reaction 2A + B--> C+D, and it is found that the reaction is 2nd order in A and…

A: Elementary reaction :  A reaction taking place in a single step is called elementary reaction. For…