Empirical And Molecular Formulas Worksheet
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1
2Success 24/7: Empirical and Molecular Formulas
What is the empirical formula?
Basically, it is the opposite of percent composition. We will give you the percentage of each element and you
will determine how many of each element are present.
Remember: Empirical formulas are the lowest whole number ratios of the elements present in a compound.
Empirical formula or no?
C
H
_________
6
9
N
O
_________
2
5
H
O
_________
2
2
Calculating Empirical Formula:
Percent to Mass
Mass to Mole
Divide by Small
Round ‘til Whole
A compound is 44.82% Potassium, 18.39% Sulfur, and 36.79% Oxygen. Write the empirical formula.
A compound is 52.0% Zinc, 9.6% Carbon, and 38.4% Oxygen. Calculate the empirical formula of the compound.
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