For the oxidation of glucose ( C6H12O6 + 2O2---„³6H2O +6CO2), how many moles of O2 will it take to consume 6 moles of glucose.

Looks to me like the equation ought to be

C6H12O6 + 6O2 -> 6H2O +6CO2

If so, then it takes 6 moles of O2 for each mole of glucose.