Answer: The missing substrate is [tex]6H_2O[/tex] .
Explanation: Plants produce energy for them self in the form of glucose and the reaction that takes place in plant leaves to produce this energy is known as Photosynthesis.
In this reaction, sim molecules of carbon dioxide and six molecules of water reacts in presence of sun light to produce one molecule of glucose and six molecules of oxygen.
The complete equation is:
[tex]6CO_2+6H_2O+energy\rightarrow C_6H_1_2O_6+6O_2[/tex]
Hence, the missing substrate is [tex]6H_2O[/tex] .
