Answer: We can say that isooctane is best classified as a fuel (letter B) in a combining reaction.
Step-by-step explanation:
The question requires us to choose among the options given which one best corresponds to the role of isooctane in a combining reaction.
Considering the options given, we can make the following comments:
- an oxidizer can be defined as "a source of oxygen". In a simple combustion reaction, for example, oxygen gas (O2) is usually used as the oxidizer.
- a fuel, in a combustion reaction (which is classified as a combining reaction), is the substance that has stored energy, or, in other words, the substance that will be burned.
- an oxidizing agent, in a redox reaction, is the substance that suffers reduction and provokes the oxidation of another substance in the reaction.
- many definitions can be used for an acid, but we can simply say that it is a substance able to realease H+ ions.
Considreing the definitions above, the structure of isooctane and the type of reaction given, we can say that isooctane best fits as a fuel (letter B).