Question

Nitrogen dioxide decomposes at 300C 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 300C. If the half-life and the rate constant at 300C are 11 seconds and 0.54 M-1 s-1, respectively, how many moles of NO2 were in the original sample?
A) 0.17 mol
B) 0.42 mol
C) 5.9 mol
D) 15 mol

Answer

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