Nitrogen Dioxide Decomposes to Nitric Oxide and Oxygen Via the Reaction

question 19

Multiple Choice

Nitrogen dioxide decomposes to nitric oxide and oxygen via the reaction: 2NO₂ → 2NO + O₂
In a particular experiment at 300 °C, [NO₂] drops from 0.0100 to 0.00650 M in 100 s. The rate of disappearance of NO₂ for this period is __________ M/s.

• A)0.35
• B)3.5 × 10^-3
• C)3.5 × 10^-5
• D)7.0 × 10^-3
• E)1.8 × 10^-3

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