Final answer:
The combustion of liquid octane with gaseous oxygen produces carbon dioxide and water. This type of reaction, where a hydrocarbon reacts with oxygen, always results in these same products.
Step-by-step explanation:
When liquid octane reacts with gaseous oxygen, the products formed are carbon dioxide and water. This is a combustion reaction common to hydrocarbons, involving a reactant containing carbon and hydrogen reacting with oxygen to produce these products. For example, the reaction of ethanol (a type of alcohol) with oxygen also yields carbon dioxide and water:
C2H5OH (l) + O2(g) → CO2 (g) + H2O(g)
Thus, the correct answer to the question of which products are formed when liquid octane reacts with gaseous oxygen gas is a) Carbon dioxide and water.