A mixture of 1 mole of H₂O and 1 mole of CO is taken in a 10 litre container and heated to 725K. At equilibrium 40% of water by mass reacts with carbon monoxide according to
the equation:
${\mathrm{CO}}_{\left(\mathrm{g}\right)}+{\mathrm{H}}_2{\mathrm{O}}_{\left(\mathrm{g}\right)}\rightleftharpoons {\mathrm{CO}}_{2\left(g\right)}+{\mathrm{H}}_{2\left(g\right)}$
The equilibrium constant K_C x 10² for the reaction is ____ (Nearest integer).