or natural gas liquids, while long-chain hydrocarbons are more viscous, and the longest chains are paraffin wax . in its naturally occurring form, it may contain other nonmetallic elements such as sulfur , oxygen , and nitrogen . [ ] it is usually black or dark brown (although it may be yellowish or...
or natural gas liquids, while long-chain hydrocarbons are more viscous, and the longest chains are paraffin wax . in its naturally occurring form, it may contain other nonmetallic elements such as sulfur , oxygen , and nitrogen . [ ] it is usually black or dark brown (although it may be yellowish or...
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