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    How is 12 obtained?
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    (Original post by marinacalder)
    How is 12 obtained?
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    (Original post by marinacalder)
    How is 12 obtained?
    It isn't.
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    (Original post by alow)
    It isn't.

    I thought so! Mark scheme must be wrong- do you get 3?
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    (Original post by marinacalder)
    I thought so! Mark scheme must be wrong- do you get 3?
    8.
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    (Original post by alow)
    8.
    care to elaborate?
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    (Original post by marinacalder)
    care to elaborate?
    Each double bond can be cis or trans.

    Therefore there are 2x2x2 possible arrangements of the bonds.
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    (Original post by marinacalder)
    care to elaborate?
    It’s a case of working out all the possible combinations:

    t t t
    t t c
    t c t
    t c c

    c c c
    c c t
    c t c
    c t t
 
 
 
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