Nitrogen Dioxide Decomposes at 300°C Via a Second-Order Process to Produce

Nitrogen dioxide decomposes at 300°C via a second-order process to produce nitrogen monoxide and oxygen according to the following chemical equation. 2 NO₂(g) → 2 NO(g) + O₂(g) .
A sample of NO₂(g) is initially placed in a 2.50-L reaction vessel at 300°C.If the half-life and the rate constant at 300°C are 44 seconds and 0.54 M^-1 s^-1,respectively,how many moles of NO₂ were in the original sample?

A) 0.042 mol
B) 0.11 mol
C) 24 mol
D) 59 mol

Correct Answer:

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