Help with #3 Module 7 HomeworkIntegrated Rate Laws1. A first order reaction has a half-life of 45 minutes. What is the approximate time required for thereaction to be 63.7% complete?2. All radioactive decay follows first order kinetics. The Half-Life for Radium-226 is 1.6 x 10³years. What percent of the original remains after 777 years.3.) A second order reaction has a rate constant of 2.3 x10-3 s-¹. What is the half-life of the reaction ifour initial concentration is 0.5 M? What if our concentration is 1.0 M?4. The decomposition of a certain insecticide in water follows zeroth order kinetics with a rateconstant of 36.6 M*months¹. A quantity of this insecticide is washed into a lake on April 1st.This leads to a concentration of 7.3 x 10³ M of insecticide in the lake. What is the concentrationof the insecticide a decade later?5.A reactant in a first order reaction is found to deplete from 6,0 M to 4.5 M in 70 seconds. Howlong will it take for the reactant to deplete from 2 M to 1.25 M?177

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Answered: 3.) A second order reaction has a rate…

3.) A second order reaction has a rate constant of 2.3 x10-³ s¹. What is the half-life of the reaction if our initial concentration is 0.5 M? What if our concentration is 1.0 M?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

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Help with #3

Module 7 Homework
Integrated Rate Laws
1. A first order reaction has a half-life of 45 minutes. What is the approximate time required for the
reaction to be 63.7% complete?
2. All radioactive decay follows first order kinetics. The Half-Life for Radium-226 is 1.6 x 10³
years. What percent of the original remains after 777 years.
3.) A second order reaction has a rate constant of 2.3 x10-3 s-¹. What is the half-life of the reaction if
our initial concentration is 0.5 M? What if our concentration is 1.0 M?
4. The decomposition of a certain insecticide in water follows zeroth order kinetics with a rate
constant of 36.6 M*months¹. A quantity of this insecticide is washed into a lake on April 1st.
This leads to a concentration of 7.3 x 10³ M of insecticide in the lake. What is the concentration
of the insecticide a decade later?
5.
A reactant in a first order reaction is found to deplete from 6,0 M to 4.5 M in 70 seconds. How
long will it take for the reactant to deplete from 2 M to 1.25 M?
177

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