Propane
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Propane is an alkane (a hydrocarbon). An alkane is a molecule composed of the chemical elements hydrogen and carbon. Propane has three carbon atoms and eight hydrogen atoms, so its molecular formula is C3H8.
It begins to burn very quickly. Its melting temperature is −187,7 °C; its boiling temperature is −42 °C; its density is 1,83 g/l.
Propane is extracted from natural gasoline or from petroleum.