For the reaction whose overall equation is

CHEMISTRY · Single correct · AP · Chemistry · Kinetics · Kinetics

Problem

2\,\mathrm{NO_2(g)} + \mathrm{F_2(g)} \rightarrow 2\,\mathrm{NO_2F(g)}

, a chemist proposes the following elementary steps: 1.

\mathrm{NO_2} + \mathrm{F_2} \rightarrow \mathrm{NO_2F} + \mathrm{F}

(fast) 2.

\mathrm{F} + \mathrm{NO_2} \rightarrow \mathrm{NO_2F}

(slow) Which species is a reaction intermediate? (a)

\mathrm{NO_2}

(b)

\mathrm{NO_2F}

(c)

\mathrm{F}

(d)

\mathrm{F_2}