(Solved): Please show step by step At a certain temperature, \( 0.620 \mathrm{~mol} \mathrm{SO} \) is placed i ...

At a certain temperature, \( 0.620 \mathrm{~mol} \mathrm{SO} \) is placed in a \( 3.50 \mathrm{~L} \) container. \[ 2 \mathrm{SO}_{3}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{SO}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \] At equilibrium, \( 0.140 \mathrm{~mol} \mathrm{O}_{2} \) is present. Calculate \( K_{\mathrm{c}} \). \( K_{\mathrm{c}} \)