Multiple Choice
Which molecular formula is correctly paired with its corresponding empirical formula?
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3. Chemical Reactions
Empirical Formula
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Which of the following is the empirical formula for propene (C3H6)?
A
CH2
B
C3H6
C
C4H8
D
C2H4
Verified step by step guidance1
Identify the molecular formula of propene, which is given as C3H6.
Determine the ratio of carbon atoms to hydrogen atoms in the molecular formula. For C3H6, the ratio is 3 carbons to 6 hydrogens.
Simplify the ratio of atoms to the smallest whole numbers by dividing both subscripts by their greatest common divisor. Here, divide both 3 and 6 by 3.
Write the empirical formula using the simplified ratio. This will give you the formula with the smallest whole number ratio of atoms.
Compare the simplified formula to the options provided to confirm which one matches the empirical formula.
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