[A0]= 0.800M
[A]=0.100M
t = 54 min
K = 2.303/t log[A0]/[A]
K = 2.303/54 log0.8/0.1
= 2.303*0.9030/54 = 0.0385 min-1
K = 2.303/t log[A0]/[A]
[A] = 0.02M
0.0385 = 2.303/t log0.8/0.02
0.0385 = 2.303*1.6020/t
t= 2.303*1.6020/0.0385 = 95.82 min >>>>> answer
The reaction A--> B is first order in A. Initially [A]= 0.800M and after 54 min.,...
In the first order reaction A---> products, [A] = 0.400 M initially and 0.250 M after 15.0 min. What is the value of the rate constant, k?
In the first order reaction A → products, [A] = 0.398 mol/L initially and 0.185 mol/L after 17.0 min. What is [A] after 250 min, in mol/L?
1. A certain first order reaction has a rate constant of 0.036 min-1. How much of the reactant will remain if the reaction is run for 2.5 hours and the initial concentration of the reactant is 0.31 M? 2. A certain first order reaction has a rate constant of 0.036 min-1. How much of the reactant will remain if the reaction is run for 2.5 hours and the initial concentration of the reactant is 0.31 M? 3. The rate constant...
The decomposition of A to B is a first-order reaction with a half-life of 29.9 min: A → 2B If the initial concentration of A is 0.463 M, how long will it take for the concentration of A to decrease by 21.3 %? 10.3 min 11.4 min 9.58 min 66.7 min 8.84 min
1a) The decomposition of hydrogen peroxide is first order in [H2O2]. After 60 min the [H2O2] has fallen from 3.7 M to 3.4 M. The rate constant k, in min-1 , is A. 1.4 X 10-3 B. 6.1 X 10-4 C. 2.7 X 10-2 D. 8.3 X 10-3 E. 1.2 x 10-2 1b) What is the half-life, in seconds, of a first order reaction if 30% of the reactant has decomposed in 50 seconds? A. 50 B. 83 C. 26...
For a first-order reaction, A → B + C, 15% of A was consumed after 10 min. How much of A was consumed after 30 min? Select one: a. 61% b. 55% c. 45% d. 39%
2. Answer the following questions by connecting the half-life of each first-order reaction to the rate constant. a. The rate constant of a first-order reaction is 2.43 × 10–2 min–1. What is the half-life of the reaction? (2 points) b. A first-order reaction has a rate constant of 0.547 min-1. How long will it take a reactant concentration 0.14 M to decrease to 0.07 M? (2 points) c. The half-life of a first-order reaction is 5.47 min. What is the...
Calculate the half life, t½ (in min) for the first order reaction, A → B, if the reaction is 29.4% complete in 19.5 minutes. Report your answer to THREE significant figures.
The decomposition of in is a first-order reaction. If 1.77 mg of is present initially and 1.71 mg is present after 5.98 minutes at 55 °C, what is the value of the rate constant?
1) A certain first order reaction has a rate constant of 0.038 min-1. How much of the reactant will remain if the reaction is run for 2.5 hours and the initial concentration of the reactant is 0.35 M? 2)Which of the following correctly represents a first order integrated rate law? (Select all that are correct, there may be more than one.) A. [A]0 = [A]te-kt B. [A]t = [A]0ekt C. ln [A]t = ln [A]0 - kt D. [A]t =...