What mass of co2 do you introduce into the earths atmosphere by completely burning

What mass of co2 do you introduce into the earths atmosphere by completely burning one tank of gasoline in your automobile? Assume octane = 114.23 g/mole density of octane = 0.707 kg/L your tank holds 22.5 gallons of gasoline provide the answer in (U.S. Customary or imperial) pounds and kilograms.