calculate the oxygen required to covert 63g of glucose to CO2 and H2O

Question

Glucose, C6H12O6 is used as an energy source by the human body. The overall reaction in the body is described by the equation

C6H12O6(aq) + 6O2 (g) = 6CO2 (g) + 6H2O (l)

Calculate the number of grams of oxygen required to convert 63g of glucose to CO2 and H2O.

Mass of O2:

Calculate the number of grams of CO2 Produced

Mass of CO2:

Answer 1

C₆H₁₂O₆(aq) + 6O₂ (g) = 6CO₂ (g) + 6H₂O (l) ... balanced equation

To find g of O2 needed to convert 63 g glucose to CO2 and H2O can be determined from the balance equation. It takes 6 MOLES of O2 for each 1 MOLE of glucose. So we convert g of glucose to moles, then multiply by 6 to get moles of O2 and then use the atomic mass of O2 to convert to grams. This looks like this..

63 g glucose x 1 mol glucose / 180 g x 6 mol O2 / mol glucose x 32 g O2 / mol = 67.2 g O2 needed

To find g of CO2 produced, we can look to the balanced equation again. 6 moles CO2 are formed from 6 moles of O2.

67.2 g O2 x 1 mol O2 / 32 g x 1 mol CO2 / mol O2 x 44 g CO2 / mol = 92.4 g CO2