At , the gas-phase reaction has the rate law . In one experiment the initial…

CHEMISTRY · Subjective · A Level · Chemistry · Rate equations · Rate equations

Problem

298\,\text{K}

, the gas-phase reaction

\mathrm{NO_2(g)} + \mathrm{F_2(g)} \rightarrow \text{products}

has the rate law

\text{rate} = k[\mathrm{NO_2}][\mathrm{F_2}]

. In one experiment the initial concentrations are

[\mathrm{NO_2}] = 2.5 \times 10^{-3}\,\text{M}

and

[\mathrm{F_2}] = 1.2 \times 10^{-2}\,\text{M}

. The measured initial rate is

4.8 \times 10^{-5}\,\text{M}\cdot\text{s}^{-1}

. Calculate the numerical value and units of the rate constant

k