How many moles of O2 are required to generate 18 moles of H2O in the given reaction?

2C8H18 + 25O2 16CO2 + 18H2O

2 moles

12 moles

16 moles

18 moles

25 moles

i ask too many questions sorry.

2.09⋅10^-5 A mole of molecules is simply a very large collection of molecules. In order to have one mole of oxygen molecules, you need to have exactly 6.022⋅1023 molecules of oxygen.

This very large number, which is known as Avogadro's number, allows you to convert from moles of a substance to molecules of a substance.