Because they are compounds containing hydrogen and carbon only
unsaturated, because they contain a C=C double bond.
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What do the alkanes have?
They have the same general formula,
they differ by CH2 in molecular formulae from neighbouring compounds,
they show a gradual variation in physical properties, such as their boiling points
have similar chemical properties
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What is the general formula for alkanes?
The general formula for the alkanes is CnH2n+2, where n is the number of carbon atoms in the molecule.
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