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Which of the following is an example of an empirical formula?
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3. Chemical Reactions
Empirical Formula
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Which pair of substances has the same empirical formula?
A
C6H12O6 and C2H6O
B
C2H4 and C3H6
C
CH4 and C2H2
D
C2H6 and C3H8
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Recall that the empirical formula represents the simplest whole-number ratio of atoms of each element in a compound.
For each substance, determine the ratio of atoms by dividing the number of atoms of each element by their greatest common divisor (GCD).
Calculate the empirical formula for each substance: For example, for C6H12O6, divide each subscript by 6 to get C1H2O1, which simplifies to CH2O.
Compare the empirical formulas of each pair to see which pair has identical empirical formulas.
Identify the pair where both substances share the same simplest ratio of atoms, indicating they have the same empirical formula.
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