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Molecular formula

  1. Oct 18, 2006 #1
    A compound has the empirical formula CNH4. If 0.2 mol of its molecules has the mass 12.0 g, what is the molecular formula?
  2. jcsd
  3. Oct 20, 2006 #2
    0.2 mol = 12.0g
    From here, you can calculate 1 mol=60g.

    Then, 60 = (12+14+4)n, where 12+14+4 are the molar mass of CNH4. Then, you obtain the value of n. Times the value of n into CNH4, you would obtain its molecular formula.
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