Chemistry

Problem

For the reaction

2\,\mathrm{NO(g)} + \mathrm{O_2(g)} \rightleftharpoons 2\,\mathrm{NO_2(g)}

0.250\,

\pm

\,0.002\,mol of

\mathrm{NO}

and 0.200\,

\pm

\,0.002\,mol of

\mathrm{O_2}

are introduced into a rigid 2.00\,L container at 298\,K. At equilibrium, 0.150\,

\pm

\,0.002\,mol of

\mathrm{NO}

remain. Determine the equilibrium constant

K_c

at 298\,K and report it using the correct number of significant figures justified by the experimental data.