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Question

Green plants use light from the Sun to drive photosynthesis. Photosynthesis is a chemical reaction in which water  and carbon dioxide  chemically react to form the simple sugar glucose  and oxygen gas .

What mass of simple sugar glucose is produced by the reaction of 6.16g

of water?

Be sure your answer has the correct number of significant digits.

Answer 1

If you look at the balanced chemical equation for this reaction, you see it is...

6CO₂ + 6H₂O ==> C₆H₁₂O₆ + 6O₂

carbon dioxide + water ==> glucose + oxygen gas

Using the stoichiometry of the above balanced equation, and dimensional analysis, we can calculate the mass of glucose that is produced by the reaction of 6.16 g of water:

6.16 g H2O x 1 mol H2O/18 g x 1 mol C6H12O6/6 mol H2O x 180 g C6H12O6/mol = 10.27 g glucose = 10.3 g glucose (to 3 significant figures)