Balance the following equation: __C3H8 __O2 __CO2 __H2O propane + oxygen  carbon dioxide + water
and answer questions #15 & #16 based on the balanced equation.
15. How many dm3 of oxygen at STP would be required to react completely with 38.8g of propane? (3 marks)
** 1dm3 = 1000mL
16. How many grams of water can be generated from the combustion of 40.0g of propane in an excess of oxygen? (3 marks)