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Most - CH4 Least - unanswerable as so very many high molecular weight hydrocarbons have almost no vapour pressure. Hydrocarbon would include compounds such as macro-molecules of rubbers and other 3 dimensional polymers.

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Q: Which hydrocarbon is most volatile and which is least volatile?
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Are short hydrocarbon molecules volatile?

Short-chain hydrocarbon molecules excluding methane and ethane are considered to be volatile organic compounds. Generally this is defined as the range from propane to octane,


How is a substituted hydrocarbon created from a hydrocarbon chain?

A substituted hydrocarbon created from a hydrocarbon chain is by replacing at least one hydrogen atom with an atom of another element.


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Is a hydrocarbon molecule classified as an alkyne if it has at least one quadruple bond?

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