. At 25°C, the value of Kc for the following reaction is 82. \mathrm{I}_{2(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})} \rightleftharpoons 2 \mathrm{ICl}_{(\mathrm{g})} 0.83 mol of I2(g) and 0.83 mol of Cl2(g) are placed in a 10 L containerat 25°C. What are the concentrations of the three gases at equilibrium? At a certain temperature, Kc = 4.0 for the following reaction. 2 \mathrm{HF}_{(\mathrm{g})} \rightleftharpoons \mathrm{H}_{2(\mathrm{~g})}+\mathrm{F}_{2(\mathrm{~g})} A 1.0 L reaction vessel contained 0.045 mol of F2(g) at equilibrium.What was the initial amount of HF in the reaction vessel?