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chemistry

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Naphthalene, commonly known as moth balls, is composed of 93.7% carbon and 6.3% hydrogen.
determine the empirical for naphthalene.
molecular formula for Naphthalene. Determine the number of empirical formulas you would need to make a full naphthalene molecule.

  • chemistry - ,

    Take a 100 g sample which will give you
    93.7 g C
    6.3% H.
    Convert each to mols.
    93.7/12 = ?
    6.4./1 = ?
    Now find the ratio of the two and that gives the empirical formula. There isn't enough information to find the molecular formula.

  • chemistry - ,

    1. 93.7g C x mole/12.00g C =7.8
    6.3g H x mole/1.01g H =6.23

    2. divide the smallest number. (6.23)
    H 6.23/6.23 =1
    C 7.8/ 6.2= 1.25

    3. Multiply by 4.
    H 1x4 = 4
    C 1.25x4 = 5

    4. Empirical formula is C5H4

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