Final answer:
The missing product in the process of cellular respiration is carbon dioxide (CO₂).
Step-by-step explanation:
In the process of cellular respiration, the missing product is carbon dioxide (CO₂). Cellular respiration is the process by which cells break down glucose in the presence of oxygen to release carbon dioxide, water, and energy. The overall chemical equation for cellular respiration is:
C6H12O6 + 6O2 → 6CO₂ + 6H2O + Energy (in the form of ATP)
Water is also produced as a product, along with carbon dioxide and energy, during cellular respiration.