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ID number:839490
 
Evaluation:
Published: 23.11.2002.
Language: English
Level: Secondary school
Literature: n/a
References: Not used
Extract

Petroleum is an oily flammable liquid composed by hydrocarbons, which is found
naturally beneath the Earth's surface by drilling wells, and it is usually
called crude oil. The color of petroleum can be colorless, which is usually
for gasoline, and heavy black which is high in asphalt content. It consists of
a mixture of hydrocarbons, with traces of various nitrogenous and sulfurous
compounds.
50-90% of petroleum is hydrocarbons and the remaining is composed chiefly of
organic compounds containing oxygen, nitrogen, or sulfur. Pennsylvania crude
oils contain 97-98% hydrocarbons, but some…

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