Propane is a hydrocarbon with its molecules joined by a single covalent bond. Propanes molecular formula is C₃H₈. Propane is a flammable hydrocarbon gas, which is both colorless and odorless in its natural state. The molar mass is 44.1 g/mol. Propane exists as a liquid and a gas. It is important today because we use it as a clean, versatile energy source, propane is frequently used for home heating, water heating, cooking, fireplaces, and clothes drying. In outdoor spaces. It is also a widely used energy source for outdoor grills, lighting, and heating for pools and spas.