Petroleum is derived from two Latin words Petrarch (petra) that Oliver Stone Ummah (Oleum) means that the oil then combined with meaning. Oil from rock Petroleum is a mixture of various hydrocarbons and organic compounds that occur naturally. Appear in both liquid and gas. Liquid crude oil from various sources. May have different physical properties such as viscosity similar to a thick, sticky asphalt with yellow, green, brown, or black. A density of 0.79 to 0.97
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