For part(ii),
Construct your Initial Change Equilibrium (ICE) table.
Initial no. of moles of both reactants given. Let change be -2x,
-x and +2x.
Equilibrium (for this temperature) sees 95% conversion of
SO2. Definition of % conversion is
change(SO2)/initial(SO2) x 100%.
Hence calculate your x.
Hence calculate your Kc value, where Kc formula = molarities of
RHS species / molarities of LHS species, and molarities are raised to the power of
the stoichiometric coefficients.
(Reminder : note that the volume of the reaction chamber is
2dm3. Use this volume when calculating molarities).
