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Math Help - Chemistry problem

  1. #1
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    Chemistry problem

    Determine the mass, in grams, of a quantity of the amino acid lysine, containing 3.13 mol N atoms.

    i tried a few different things but none of them seem to give me the right answer.
    Last edited by phthiriasis; October 3rd 2008 at 04:24 PM.
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  2. #2
    o_O
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    Since you have 3.13 moles of nitrogen atoms and there are 2 nitrogen atoms per molecule, there must be \frac{3.13}{2} = 1.565 moles of lysine.

    The molar mass of lysine is 146.188 g/mol (from wikipedia, use your own period table for this value).

    Simply multiply them together and you should get the amount of lysine in grams.
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