Chemistry – Gases

A steel cylinder contains 5.00 moles of graphite and 5.00 oles of O2.  The mixture is ignited and all the graphite reacts.  Combustion produces a mixture of CO gas and CO2 gas.  After the cylinder has cooled to its original temperature, it is found that the pressure of the cylinder has increased by 17%.  Calculate the mole fractions of CO, CO2, and O2 in the final gaseous mixture.