Dinitrogen Tetroxide Decomposes to Form Nitrogen Dioxide in a Second-Order

question 1

Multiple Choice

Dinitrogen tetroxide decomposes to form nitrogen dioxide in a second-order reaction:
N₂O₄(g) → 2NO₂(g)
At 400.0 K,the rate constant for this reaction has been measured to be 2.9 × 10⁸ L/(mol ∙ s) .Suppose 0.742 mol of N₂O₄(g) is placed in a sealed 34.3-L container at 400.0 K and allowed to react.What is the total pressure inside the vessel after 49.6 ns has elapsed? (R= 0.0821 (L ∙ atm) /(K ∙ mol) )

• A)​0.879 atm
• B)​0.7138 atm
• C)0.541​ atm
• D)2.13​ atm
• E)1.42​ atm

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