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Homework Help: [Simple question] Number of moles of a compound

  1. Jan 16, 2013 #1
    1. The problem statement, all variables and given/known data

    Estimate the number N of molecules in a few grams of matter. Explain why in that case ln (N) is of the order of 50 whatever the chemical composition.

    2. Relevant equations

    M = m/N

    where M is the molecular mass

    3. The attempt at a solution

    I'm really unsure about the entire question. I have no idea what he's asking, but I might be over thinking it. I don't even know where to start.
  2. jcsd
  3. Jan 17, 2013 #2


    User Avatar

    Staff: Mentor

    What is the average molar mass of a typical compound made of just a few atoms?

    Say - 4 atoms. What is the molar mass of the lightest possible compound? Of the heaviest one?
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