Respuesta :

Edufirst

Answer:

  • About 66 moles

Explanation:

1. Chemical equation

The reaction of C₆H₁₄ with O₂ is the combustion of an hydrocarbon. Such reactions yield CO₂ and water.

The chemical equation is:

  • C₆H₁₄ + O₂ → CO₂ + H₂O

Which when balanced is:

  • 2C₆H₁₄ + 19O₂ → 12CO₂ + 14H₂O

2. Mole ratio

The coefficients on the balanced chemical equation tell the relative amounts of each substance, reactants and products, that participate on the chemical reaction.

  • 19 moles of  O₂ react with 2 moles of C₆H₁₄

  • (19 mol O₂ / 2 mol C₆H₁₄) × 6.9 mol C₆H₁₄ = 65.55 mol O₂

Round to two significant figures: 66 mol of O₂ ← answer