By seeing the unit of k, we can say that this is 2nd order reaction.
we have:
[A]o = 0.75 M
[A] = 0.5 M
k = 2.5*10^-3 M-1.min-1
use integrated rate law for 2nd order reaction
1/[A] = 1/[A]o + k*t
1/(0.5) = 1/(0.75) + 2.5*10^-3*t
2 = 1.333 +2.5*10^-3*t
2.5*10^-3*t = 0.6667
t = 2.667*10^2 min
Answer: 267 min
4. The rate constant for the reaction rate constant for the reaction 3A 4B is 2.50 x 10-3 L mol-min". How long will...
The rate constant for the reaction 3A-4B is 2.50 x 103 L mol'min. How long will it take the concentration of A to drop from 0.75 M to 0.50 M? (6 points) 4.
16. A. B. C. D. E. The rate constant for the reaction 3A 4B is 6.00 x 10L mol minHow long will it take the concentration of A to drop from 0.75 M to 0.25 M? 2.2 x 10 min 5.5 * 10 min 180 min 440 min 5.0 x 10 min
4. The rate constant for the reaction 3AAR is 250 x 10 molminHow long will it take the concentration of A to drop from 0.75 M to 0.50 M? (6 points) 5. The rate constant for the reaction 3A - 2B is 0.0447 5. What is the half-life of the reaction? (2 points) 6. Consider the reaction 3A C. If the reaction is second order with a half-life of 20.0 hrs Starting the reaction with an initial concentration of A...
3. A reaction has a rate constant of 3.15 x 10 -4 L mol -1 min -1 at 25 °C, and a rate constant of 3.72 x 10 -3 L mol -1 min -1 at 40 °C. What is the activation energy for the reaction? Give your answer to 3 significant figures.
Assignment 4 Application of Kinetics 1. A reaction AB has rate constant of 10.018 L/mol min) How long does it take for the concentration of A to decrease to to th of its initial concentration of 2.5m? 14 2. The half-life for the decay of C is 5730 years. it emits ß-rays with an energy of 0.16 MeV. A sa. of wood has a72% of its 14 C left. What is the sample age of this word ? 3. when...
A reaction has a rate constant of 7.85x 10 -6 L mol -1 min -1 at 30 °C, and a rate constant of 1.26 x 10 -5 L mol -1 min -1 at 35 °C. What is the activation energy for the reaction? Give your answer to 3 significant figures.
A certain reactant disappears by a first order reaction that has a rate constant K= 3.5x10^-3 s-1. If the initial concentration of the reactant is 0.500 M , how long will it take for the concentration to drop to 0.200 M ? 4. A certain reactant disappears by a first-order reaction that has a rate constant k=3.5 x 10 s. If the initial concentration of the reactant is 0.500 M, how long will it take for the concentration to drop...
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 reaction below has rate constant 2.50 x 10 -1 min -1 and obeys the rate law: rate = k [A]. At what time will 61.9 % of A have reacted?
Part A Review ConstantsI Periodic Table How many moles of N2O, will remain after 7.0 min? The first-order rate constant for the decomposition of N2 O Express the amount in moles to two significant digits. 2N2Os (g)+4NO2(g) +02(g) n1.6x10-3 mol at 70° C is 6.82 x 103 s-, Suppose we start with 2.80x102 mol of N2O5 (g) in a volume of 2.0 L You may want to reference (Page) Section 14.4 while completing this problem. Correct The rate of reaction...