What is the chemical equation for photosynthesis?

The correct representation of the chemical equation for photosynthesis is the synthesis of glucose and oxygen from carbon dioxide and water, utilizing the energy captured from sunlight. This process occurs primarily in the chloroplasts of plants.

Photosynthesis can be summarized by the equation:

6 CO2 + 6 H2O + light energy → C6H12O6 + 6 O2.

In the context of the options provided, the first choice correctly emphasizes the involvement of water (H2O), carbon dioxide (CO2), and sunlight as necessary inputs, producing glucose (C6H12O6) and oxygen (O2) as outputs. This not only reflects the balance of molecules but also highlights that energy from the sun is essential for driving the overall reaction.

The other options do not accurately represent the process of photosynthesis, either by reversing the flow of the reaction or by including incorrect substances or energy forms. Understanding that photosynthesis converts light energy into chemical energy stored in glucose is crucial for recognizing why this specific equation is the correct one.