Which of these is a correctly balanced equation for respiration? C6H12O6 + 3O2 → CO2 + 3H2O C6H12O6 + 6O2 → 6CO2+ 6H2O C6H12O6 + 6O2 → 6CO2 + 3H2O

Teaching points:

Go through balancing equations 

Formalae of glucose 

Different types of Respiration - and how to balnce other equations 

Respiration in animals vs plants 

By product of Lactic acid - what it is and how the body deals with it