As with any combustion reaction, the products of combusting ahydrocarbon fuel (CxHy) with oxygen (O2) are carbon dioxide (CO2)and water (H2O).
A mass of 16.89 g for an unknown fuel was combusted ina reaction vessel containing an unknown amount of oxygen. At theend of the reaction, there still remained 16.85 g of the fuel aswell as 0.0654 g of water and 0.1198 g of carbon dioxide. Theoxygen was completely consumed during the reaction.
How many molecules of oxygen gas were initially present in thereaction vessel?
Express the number of molecules to three significant digits
