For the molecular species degree of freedom analysis, how many independent chemical reactions are present?

Can someone me with questions 12 and 13 plz.

Drug abuse will not lead to physical and psychological dependence. true or false ?

We are hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?