General Chemistry for EngineersLesson: Chemical Kinetics Directions: Answer the following problems by showing the complete solution. In return, I will give you a good and high rating. Thank you so much!Note: Please input the units and measurements in the calculations. Thank you so much!Number 19 and 20 19) What is the half-life for a first-order reaction?A. t1/2= kB. t1/2= 1/k[A]oC. t1/2 = 0.693/k[A]oD. t1/2= 0.693/k 20)At 25°C the rate constant for the first-order decomposition of a pesticide solution is 6.40 x 10-3 min-1. If the starting concentration of pesticide is 0.0314 M, whatconcentration will remain after 62.0 min at 25°C?A. 1.14 x 10-1 MB. 47.4 MC. 1.25 x 10-² MD. 2.11 x 10-2 M

19) we have to determine the formula of half-life for 1st order reaction 20) we have to calculate…

Answered: 19) What is the half-life for a…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter30: Kinetic Methods Of Analysis

Section: Chapter Questions

Problem 30.7QAP

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General Chemistry for Engineers

Lesson: Chemical Kinetics

Directions: Answer the following problems by showing the complete solution. In return, I will give you a good and high rating. Thank you so much!

Note: Please input the units and measurements in the calculations. Thank you so much!

Number 19 and 20

19) What is the half-life for a first-order reaction?
A. t1/2= k
B. t1/2= 1/k[A]o
C. t1/2 = 0.693/k[A]o
D. t1/2= 0.693/k

20)
At 25°C the rate constant for the first-order decomposition of a pesticide solution is 6.40 x 10-3 min-1. If the starting concentration of pesticide is 0.0314 M, what
concentration will remain after 62.0 min at 25°C?
A. 1.14 x 10-1 M
B. 47.4 M
C. 1.25 x 10-² M
D. 2.11 x 10-2 M

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