What is the primary component of propane?

The primary component of propane is C3H8, which is its chemical formula. This indicates that one molecule of propane contains three carbon atoms and eight hydrogen atoms. Understanding the molecular structure is essential, as propane is classified as a hydrocarbon, falling within the category of alkanes due to its saturated nature.

Propane is commonly used as a fuel source in heating and cooking because of its efficiency and energy content. Its combustion produces a significant amount of energy while generating relatively low emissions compared to other fossil fuels.

In contrast, the other options represent different hydrocarbons with distinct properties. Ethane (C2H6) and butane (C4H10) have their own specific applications and characteristics but are not relevant to propane. Methane (CH4) is the simplest alkane and is primarily used as a natural gas, but it does not constitute propane. Thus, the correct answer is C3H8, as it accurately represents the chemical structure of propane.