At Elevated Temperatures, Nitrogen Dioxide Decomposes to Nitrogen Oxide and Oxygen

question 33

Multiple Choice

At elevated temperatures, nitrogen dioxide decomposes to nitrogen oxide and oxygen: NO₂ (g) → NO (g) + O₂ (g)
The reaction is second order in NO₂ with a rate constant of 0.543 M^-1s^-1at 300 °C. If the initial [NO₂] is 0.260 M, it will take ________ s for the concentration to drop to 0.075 M.

• A)3.34
• B)0.0880
• C)2.29
• D)0.299
• E)17.5

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