객관식
How many fluorine atoms are present in one molecule of CH3F?
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Molecular Formula
객관식
What is the total number of carbon atoms in a molecule of ethanoic acid (CH3COOH)?
A
4
B
2
C
3
D
1
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검증된 단계별 안내1
Identify the molecular formula of ethanoic acid, which is CH\3COOH.
Break down the formula into its constituent parts: CH\3 (methyl group) and COOH (carboxyl group).
Count the number of carbon atoms in each part: CH\3 contains 1 carbon atom, and COOH contains 1 carbon atom.
Add the carbon atoms from both parts together: 1 (from CH\3) + 1 (from COOH) = 2 carbon atoms.
Conclude that the total number of carbon atoms in a molecule of ethanoic acid is 2.
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