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Crude Oil Essay Preview: Crude Oil Report this essay CRUDE OIL Petroleum consists mostly of hydrocarbon molecules. The four main classes of hydrocarbons are paraffins (also called alkanes), olefins (alkenes), cycloparaffins (cycloalkanes), and aromatics. Olefins are absent in crude oil but can be formed in certain refining processes. The simplest hydrocarbon is one carbon atom.
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Carbon AtomChemical Formula Ch4Hydrocarbon MoleculesIncomplete Combustion Of Petroleum