Butane, C4H10, is a component of natural gas that is used as fuel for cigarette lighters. The balanced equation of the complete combustion of butane is

2C4H10(g)+13O(g)-> 8CO2(g)+10H2O(l)

At 1.00 atm and 23C , what is the volume of carbon dioxide formed by the combustion of 3.40 grams of butane?

PV=nRT or n=PV/RT
R=0.08206