Bottled propane is used in areas away from natural gas pipelines for cooking and heating, and is also the source of heat in most gas barbecue grills. Propane burns in oxygen according to the following balanced chemical equation.
C3H8(g) + 5 O2(g) 3 CO2(g) + 4 H2O(g)
Calculate the mass in grams of water vapor produced if 3.09 mol of propane is burned.