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    Can you have an Alkene that has the empirical formula of C5H5???
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    Alkene is CnH2n, so no
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    Cyclodecapentaene.

    Assuming you'll allow a cyclical multiply doubly bonded alkene.
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    (Original post by Mf1999)
    Can you have an Alkene that has the empirical formula of C5H5???
    Nothing can have an emperical formula C5H5.

    Emperical means the numbers should be in their lowest integer ratio's so the emperical formula would be:
    CH

    in which case any cyclic, and fully unsaturated compound would do, eg benzene

    again im assuming multiple double bonds and rings are allowed
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    (Original post by MexicanKeith)
    Nothing can have an emperical formula C5H5.
    Ooopsie-me.

    Doubly so. Alkene have, by IUPAC definition, only one double bond.
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    (Original post by Mf1999)
    Can you have an Alkene that has the empirical formula of C5H5???
    As the That'sGreat said, it is impossible, as there is always the double number of hydrogen atoms in relation to the carbon ones. So, if there are 5 carbon atoms, there are 10 hydrogen atoms, just to name an example.
 
 
 
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