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Crude oil is a mixture of short to long chain hydrocarbons.

It has to be separated into many different fractions to become usable.

It may also contain mineral impurities due to it being underground

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11y ago
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Wiki User

13y ago

NO CRUDE OIL IS NOT A PURE SUBSTANCE BECAUSE IT IS A MIXTURE IT HAS ALL SORTS OF ALKANES IN IT :p

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Q: Is oil and water a pure substance?
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