For the following reaction \({K_{\text{c}}} = 1.0 \times {10^{ - 5}}\) at 30 °C.

\[{\text{2NOCl(g)}} \rightleftharpoons {\text{2NO(g)}} + {\text{C}}{{\text{l}}_2}{\text{(g)}}\]

Which relationship is correct at equilibrium at this temperature?

A.     The concentration of NO equals the concentration of NOCl.

B.     The concentration of NOCl is double the concentration of \({\text{C}}{{\text{l}}_{\text{2}}}\).

C.     The concentration of NOCl is much greater than the concentration of \({\text{C}}{{\text{l}}_{\text{2}}}\).

D.     The concentration of NO is much greater than the concentration of NOCl.

C

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