Posted by arcos15 on Monday, July 2, 2012 at 2:31am.
Take a 100 g sample.
61.266 g F.
38.734 g C.
mols C = 38.734/12.015 = ?
mol F = 61.266/190 = ?
Find the ratio of the two elements to each other and calculate the molar mass of the empirical formula.
Then use PV = nRT and solve for n.
From n you can calculate the molar mass by n = grams/molar mass.
Finally, empirical mass x ? = molar mass; solve for ?, and the molecular formula is (empirical formula)?
you should end up with C2F2
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