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213 solutions

Integrated Rate Law

#### Q. It takes 15.4 minutes for the concentration of a reactant to drop to 5.0% of its initial value in a second-order reaction. What is the rate constant for the reaction in the units of L mol-1 min-1?

Solved • Feb 18, 2020

Integrated Rate Law

#### Q. Hey, I'm confused about why the half-life graphs are so different for the 0th, 1st, and 2nd order reactions from their respective graphs shown immediately after that video. Like for example, 0th is decreasing, 1st is constant, 2nd is increasing but the trends are completely different when looking at the concentration of reactants for each.

Solved • Feb 18, 2020

Integrated Rate Law

#### Q. The first-order decomposition of cyclopropane has a rate constant of 6.7 × 10−4s−1. If the initial concentration of cyclopropane is 1.33 M, what is the concentration of cyclopropane after 644 s? A.0.43 M. D.0.86 M. B.0.15 M. E.0.67 M. C.0.94 M

Solved • Feb 16, 2020

Integrated Rate Law

#### Q. Nitrogen dioxide undergoes thermal decomposition according to the second-order reaction:2NO2(g)"2NO (g)+ O2(g). When 0.500 M NO2is allowed to react for 90.0 seconds, its concentration falls to 0.0196 M. What is the rate constant for the reaction? A.0.545 M−1s−1. D.0.0214 M−1s−1. B.0.589 M−1s−1. E.0.0231 M−1s−1. C.0.00534 M−1s−1

Solved • Feb 16, 2020

Integrated Rate Law

#### Q. The first-order decomposition of N2O5at 328 K has a rate constant of 1.70 × 10−3s−1. If the initial concentration of N2O5is 2.88 M, what is the concentration of N2O5after 12.5 minutes? A.0.124 M. D.0.355 M. B.0.805 M. E.0.174 M. C.2.82 M

Solved • Feb 16, 2020

Integrated Rate Law

#### Q. What is the rate constant of a first-order reaction that takes 430 seconds for the reactant concentration to drop to half of its initial value? Express your answer with the appropriate units.

Solved • Feb 11, 2020

Integrated Rate Law

#### Q. A certain first-order reaction has a rate constant of 2.80x10^-3 s^-1. how long will it take for the reactant concentration to drop to 1/8 of its initial value? Express your answer with the appropriate units.

Solved • Feb 11, 2020