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 oxygen gas is produced by the reaction of of carbon dioxide? Be sure your answer has the correct number of significant digits.

Answer 1

Answer:

See the explanation below

Explanation:

From the balanced equation of photosynthesis:

$6 CO_2 + 6 H_2O -------> C_6H_{12}O_6 + 6 O_2$

6 moles of CO2 is required to produce 6 moles of oxygen.

Assuming that 5.2 g of CO2 reacts with water,

mole of CO2 = mass/molar mass = 5.2/44.01 = 0.1182 mole

Hence,

0.1182 mole of CO2 will yield 0.1182 mole of O2.

Mass of oxygen that will be produced from 5.2 g of CO2:

 = molar mass of O2 x mole of O2

         = 0.1182 x 16

             = 1.9 g of O2.

Note: Because the mass of CO2 is in two significant figure, the final answer was adjusted to be in two significant figure. The mass of oxygen can be computed depending on the mass of CO2 involved.