Question

Green plants use light from the Sun to drive photosynthesis. Photosynthesis is a chemical reaction in which water H2O and carbon dioxide CO2 chemically react to form the simple sugar glucose C6H12O6 and oxygen gas O2. What mass of oxygen gas is produced by the reaction of 8.5g of carbon dioxide? Round your answer to 2 significant digits.

Answer 1

Answer:

6.2 g

Explanation:

The mass of oxygen gas produced from 8.5 g CO2 would be 6.2 g.

First, let us look at the equation of the reaction:

$6CO_2 + 6H_2O --> C_6H_1_2O_6 + 6O_2$

From the equation, 6 moles of CO2 are required to produce 6 moles of O2.

Recall that: mole = mass/molar mass

8.5 g of CO2 = 8.5/44.01 = 0.1931 mole of CO2

Since the ratio of CO2 to O2 is 1:1, 0.1931 moles of CO2 will produce 0.1931 moles of O2.

Hence, mass of oxygen produced = mole x molar mass

                                                         = 0.1931 x 32

                                                               = 6.2 g to 2 significant digits.