Multiple Choice
Which of the following best describes the function of an emulsifier in chemistry?
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3. Chemical Reactions
Functional Groups in Chemistry
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Which of the following is the correct chemical formula for ethanol?
A
CH6O
B
C2H6O
C
C2H5O2
D
C2H5O
Verified step by step guidance1
Recall that ethanol is an alcohol with the molecular structure consisting of two carbon atoms, six hydrogen atoms, and one oxygen atom.
Write the molecular formula by counting the atoms: 2 carbons (C), 6 hydrogens (H), and 1 oxygen (O), which gives C2H6O.
Check the other options: CH6O has only one carbon, which is incorrect for ethanol; C2H5O2 has two oxygens, which is not typical for ethanol; C2H5O is missing one hydrogen compared to the correct formula.
Understand that the correct formula represents the actual number of atoms in one molecule of ethanol, not just the empirical formula or a fragment.
Conclude that the correct chemical formula for ethanol is C2H6O.
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