Question

The complete combustion (reaction with oxygen) of liquid octane (C8H18) a component typical of the hydrocarbons in gasoline, produces carbon dioxide gas and water vapor. What is the coefficient of oxygen in the balanced equation for the reaction?

A. 2.
B. 15.
C. 4.
D. 3.
E. 24
F. 20 .
G. 25

Answer 1

The coefficient of oxygen in the balanced equation for the complete combustion of octane is 25.

Step-by-step explanation:

The question asks for the coefficient of oxygen in the balanced chemical equation for the complete combustion of octane (C8H18). The balanced equation is: 2 C8H18(l) + 25 O2(g) → 16 CO2(g) + 18 H2O(g). This demonstrates that for every two molecules of octane that combust, 25 molecules of O2 are required to produce 16 molecules of CO2 and 18 molecules of water vapor. Therefore, the correct coefficient of oxygen (O2) when balancing the complete combustion of octane is 25.