How many moles of CO2 are produced
if 6 moles of O2 are used?
C6H12O6 + 602 + 6CO2 + 6H2O

6 moles

Explanation:

Forst of all arrange the equation, it isn't in the right order and I suppose the equation is of aerobic respiration:

That is :

C6H12O6 + 6O2 > 6CO2 + 6H20 + 2830kJ (energy)

Then use the ratio which can be seen by the balancing:

02 : CO2

6: 6

The ratio clearly shows how much moles of CO2 are produced; 6 moles

its first and third is your answer i did the qustion the fourth isnt right