Consider the following chemical reaction:
2 c8h18 + 25 o2 > 16 co2 + 18 h2o

what is the mole-to-mole ratio between oxygen gas and water?

25 : 18

Explanation:

Mole ratio:

It is simply the ratio between moles of any two compounds take part in chemical reaction. It gives the proportion of compounds present.

The given reaction is the burning of octane. Two moles of octane burned in the presence of twenty five moles of oxygen and produced sixteen moles of carbon dioxide and eighteen moles of water.

Chemical equation:

C₈H₁₈ + O₂     →     CO₂ +  H₂O

Balance chemical equation:

2C₈H₁₈ + 25O₂     →     16CO₂ + 18H₂O

The mole ratio of oxygen and water is 25 : 18.

right

explanation:

the volume increases