Answer to Question #348253 in General Chemistry for pearl

Question

he average human requires 120.0 g of glucose (C6H12O6) per day. How many grams of CO2 (in the photosynthesis reaction) are required in order to produce this amount of glucose?

The photosynthesis reaction is:     6CO2 + 6H2O -> C6H12O6 -> 6O2

Answer 1

M (CO₂) = 44 g/mol

M (C₆H₁₂O)₆ = 180 g/mol

6CO₂ + 6H₂O => C₆H₁₂O₆ + 6O₂

According to the reaction, 1 mole (180 g) of C₆H₁₂O₆ is formed when 6 moles (264 g) of CO₂ react. We find how many grams of CO₂ must be reacted to form 120 g of C₆H₁₂O₆

264 g CO₂ —> 180 g C₆H₁₂O₆

X —> 120 g C₆H₁₂O₆

X = 264 * 120 / 180 = 176 g CO₂

Answer: 176 g CO₂