Propane is a hydrocarbon a compound composed only of carbon and hydrogen with a molar mass of 44.0 g/mol. It is 81.82% carbon and 18.18% hydrogen.

The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 × 10 23 atoms, molecules, or formula units of that substance.

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