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    (Original post by kiiten)
    3? So Cl35 and Cl35
    Cl37 and Cl35
    Cl37 and Cl37

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    For Cl2 yes.

    For the compound containing Cl4 you discount the effects of the carbon and hydrogen on the potential different peaks because you're told they're only there as C12 and H1; they can only contribute 1 weight to the molecule, so the differences in weight are entirely down to the chlorine.
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    (Original post by Stiff Little Fingers)
    For Cl2 yes.

    For the compound containing Cl4 you discount the effects of the carbon and hydrogen on the potential different peaks because you're told they're only there as C12 and H1; they can only contribute 1 weight to the molecule, so the differences in weight are entirely down to the chlorine.
    Ahhh i see - its asking about differences in weight. I understand now - thanks so much for your help!

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    Could we use this thread for anyone to ask about multiple choice ques? If so we'll need some helpers....

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