Chemistry

Problem

A 1.50 g sample of dinitrogen tetroxide is placed in a 2.00 L rigid flask at 298 K, where it partially dissociates according to

\displaystyle \text{N}_{2}\text{O}_{4}(g)\rightleftharpoons 2\text{NO}_{2}(g)

. The total pressure at equilibrium is 0.270 atm. What is the value of

K_{c}

at 298 K? a)

1.3\times10^{-2}

1.2\times10^{-3}

6.3\times10^{-3}

2.6\times10^{-4}