Question

In a process called photosynthesis, plants use carbon dioxide and water, along with energy from sunlight, to produce sugar and oxygen. Photosynthesis is represented by the equation What must a plant need to produce 4 molecules of sugar? 6 molecules of CO2 6 molecules of H2O 18 molecules of CO2 24 molecules of H2O
What must a plant need to produce 4 molecules of sugar?

6 molecules of CO2
6 molecules of H2O
18 molecules of CO2
24 molecules of H2O

Answer 1

Answer;

24 molecules of water and 24 molecules of carbon dioxide

Explanation;

• Photosynthesis is the process by which plant make their own food by using energy from the sun, water and carbon dioxide to produce simple sugars and oxygen.
• The equation for the reaction is;  6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂; this means that for every molecule of glucose produced 6 molecules of carbon dioxide are consumed.
• Therefore, to produce 4 molecules of glucose the reaction will consume 4×6 =24 molecules of carbon dioxide gas and 4×6 =24 molecules of water.

Answer 2

The process of photosynthesis is given by the equation
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ with sunlight as a source of energy for the reaction to proceed. To produce four molecules of sugar, multiply the whole equation by 4 and we have 
24CO₂ + 24H₂O → 4C₆H₁₂O₆ + 24O₂

Therefore, the plant needs 24 molecules of sugar.