3-ethyl-4-methylhexa-1,3-diene undergoes a combustion reaction. For this reaction, the following  concentrations were used: [O2] = 0.06 M, [CO2] = 0.09 M and [H2O] = 0.10 M. Determine the  concentration (in mol/L) used of 3-ethyl-4-methylhexa-1,3-diene if the following thermodynamic  parameters were determined for the reaction at 25 °C: ΔH = -763.02 kJ/mol and ΔS = -2542.01 J/K  mol.