Multiple Choice
Which elements are present in the compound calcium carbonate (CaCO_3)?
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3. Chemical Reactions
Empirical Formula
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Which pair of compounds has the same empirical formula?
A
C2H6 and C4H10
B
C3H8 and C4H8
C
C2H2 and C6H6
D
C2H4 and C3H6
Verified step by step guidance1
Understand that the empirical formula represents the simplest whole-number ratio of atoms of each element in a compound.
For each compound, determine the ratio of carbon (C) atoms to hydrogen (H) atoms and simplify it to the smallest whole numbers.
For example, for C2H6, divide both subscripts by 2 to get the empirical formula C1H3 (or CH3).
Repeat this process for the other compounds: C4H10, C3H8, C4H8, C2H2, and C6H6, simplifying their formulas to empirical formulas.
Compare the simplified empirical formulas of each pair to identify which pair has the same empirical formula.
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