Empirical Formula

·         Are the simplest formula of a compound

<!--[if !supportLists]-->·         <!--[endif]-->Show only the simplest ratios, not the actual atoms

<!--[if !supportLists]-->-          <!--[endif]-->The empirical formula for Chlorine gas is Cl

<!--[if !supportLists]-->-          <!--[endif]-->Dinitrogen tetraoxide empirical formula is NO2

<!--[if !supportLists]-->·         <!--[endif]-->Molecular formulas give the actual number of atoms

Example:

Molecular Formula	Empirical Formula
P4O10	P2O5
C10H22	C5H11
C6H18O3	C2H6O
C5H12O	C5H12O
N2O4	NO2

 

Atom	Mass	Molar Mass	Moles (mass/molar mass)	Smallest Moles (moles/smallest moles)	Ratio
C	0.576	12.0	0.048	0.048/0.012=4	4
H	0.120	1.0	0.120	0.120/0.012=10	10
O	0.192	16.0	0.012	0.012/0.012= 1	1

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By: Krysta Del Rosario :)