Ch.13 - Chemical KineticsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: The reaction 2NO2 → 2NO + O2 obeys the rate law: Δ[O2]/Δt = (1.40 x 10 -2 sec) [NO2]2 at 500. K. If the initial concentration of NO2 is 1.00 M, how long will it take for the [NO 2] to decrease to 14.2

Problem

The reaction 2NO2 → 2NO + O2 obeys the rate law: 

Δ[O2]/Δt = (1.40 x 10 -2 sec) [NO2]2 at 500. K. 

If the initial concentration of NO2 is 1.00 M, how long will it take for the [NO 2] to decrease to 14.2% of its initial value? 

A) 61.3 s 

B) 139 s 

C) 432 s 

D) 1.40 x 10-2

E) cannot be determined from this data