How do you write a balanced equation for the combustion (reaction with oxygen gas) of glucose, #C_6H_12O_6#, to give carbon dioxide and water?
Is charge balanced? Is mass balanced? Do not trust my arithmetic. How would energy transfer in the reaction? Is the reaction endothermic or exothermic?
As to how I balanced the equation, I know that products of combustion are carbon dioxide and water. Under conditions of complete combustion, a carbohydrate (or alkane) gives stoichiometric carbon dioxide and water. You can balance the oxygen last. Given this it is a fairly easy exercise to ensure that garbage out equal garbage in.