Empirical Formulas

empirical formulas are pretty much just the simplest version of any chemical formula.

Molecular Empirical
P4H10 - - - - - P2H5
C10H22 - - - - - C5H11
C6H18O3 - - - - - C2H6O
N2O4 - - - - - - NO2

empirical formulas the simplest whole number ratios in a compound

molecular atoms show the actual atoms and bonds in a compound

finding empirical formulas:
a sample of an unknown compound in analyzed and found to contain 8.4g of carbon, 21g of hydrogen and 5.1g or oxygen. find the empirical formula

element - atomic mass- mass - moles - smallest divided - smallest ratio
carbon 12 8.4 .7 2.187 2
hydrogen 1 2.1 2.1 6.56 7
oxygen 16 5.1 .32 1 1

the empirical formula = C2H7O

comprende? thats pretty much all we did, it was a short class today

for a fun worksheet, click here!