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Chem empirical questions?

  1. Jan 8, 2006 #1
    I searched the internet for the answers and i keep coming up short maybe someone could help??????




    1. Which of the following is an empirical formula?
    a) C5H10O5
    b) C6H12O2
    c) C12H17OH


    Which of the following is an empirical formula?
    NaO
    C2H8N2
    C6H3Cl2
    What is the percent carbon in carbon dioxide?
    12.01%
    27.3%
    44.009%

    What is the percent nitrogen in potassium nitrate?
    13.9%
    101.1%
    19.007%
    Calculate the empirical formula for a compound that is 94.1% O and 5.9% H.
    H2O
    H2O2
    HO2
    HO
     
  2. jcsd
  3. Jan 8, 2006 #2

    mrjeffy321

    User Avatar
    Science Advisor

    empirical formulas give the simplest whole number rations of the elements in a compound.
    Take C5H10O5 for example, the ratio between Carbon:Hydrogen:Oxygen is 5:10:5. This can be simplified to 1:2:1 and the ration remains the same, so we know this in a not an empirical formula. But on the other hand, of C12H17OH cannot be simplified without changing the ratio.

    You might also want to have a look here,
    http://www.chem.tamu.edu/class/majors/tutorialnotefiles/empirical.htm
     
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