Empirical Molecular Formula NOTES 2015.notebook
December 19, 2016
The molecular formula represents the actual number of atoms in a compound.
The empirical formula represents the simplest whole number ratio of atoms in a compound.
What is the empirical formula for each of the following?
C6H10I2O4
C15H36N6
C10H16O4
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Empirical Molecular Formula NOTES 2015.notebook
December 19, 2016
Determine the molecular formula, given an empirical formula of SO2 and a molecular weight of 192.3g/mol.
Calculate the empirical formula of a compound that contains 33.88% copper 14.94% nitrogen, and 51.18% oxygen.
1) Assume 100 grams of compound
2) Change % to grams, then grams to moles
3) Divide all answers by smallest # of
moles to get simplest mole ratio
4) Ratios become subscripts
5) Must use whole numbers as subscripts
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Empirical Molecular Formula NOTES 2015.notebook
December 19, 2016
Calculate the empirical formula of a compound that contains 33.88% copper 14.94% nitrogen, and 51.18% oxygen.
A sample is found to contain 40.00% carbon, 6.71% hydrogen and 53.29% oxygen. Calculate the empirical formula.
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Empirical Molecular Formula NOTES 2015.notebook
December 19, 2016
If the compound with empirical formula CH2O has a molecular weight of 180.0g/mol, what is the molecular formula?
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