Question

If 7.4 moles of carbon dioxide is produced in this reaction, how many moles of oxygen gas would be needed?

1 C7H16 + 11 O2 = 7 CO2 + 8 H2O

Answer 1

11.6 mol O₂

Step-by-step explanation:

• C₇H₁₆ + 11 O₂ → 7 CO₂ + 8 H₂O

In order to solve this problem we need to convert moles of carbon dioxide (CO₂) into moles of oxygen gas (O₂). To do so we'll use a conversion factor containing the stoichiometric coefficients of the balanced reaction:

• 7.4 mol CO₂ *
  `(11molO_2)/(7molCO_2)` = 11.6 mol O₂