객관식
Which of the following best represents the correct Lewis structure for the (dimethylammonium) ion?
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1. A Review of General Chemistry
Lewis Structure
객관식
Which of the following best describes the Lewis structure of (ethylene glycol, also written as HOCHCHOH)?
A
Each carbon atom is bonded to one hydrogen atom, one hydroxyl group (), and two oxygen atoms.
B
Each carbon atom is bonded to two hydrogen atoms, one hydroxyl group (), and the two carbons are bonded to each other; all atoms have complete octets except hydrogen.
C
Each carbon atom is bonded to three hydrogen atoms and one hydroxyl group (), with no carbon-carbon bond.
D
The two carbon atoms are connected by a double bond, and each carbon is bonded to one hydrogen and one hydroxyl group ().
검증된 단계별 안내1
Identify the molecular formula and structure of ethylene glycol, which is HOCH\_2CH\_2OH, meaning two carbon atoms each bonded to hydroxyl (OH) groups and hydrogens.
Recall that each carbon atom forms four bonds to satisfy the octet rule, and hydrogen atoms form only one bond each.
Determine the connectivity: the two carbon atoms are bonded to each other, each carbon is bonded to two hydrogens and one hydroxyl group (OH).
Verify that all atoms have complete octets except hydrogen, which only requires two electrons (one bond). Oxygen in the hydroxyl groups forms two bonds (one to carbon and one to hydrogen) and has lone pairs to complete its octet.
Conclude that the correct Lewis structure shows each carbon bonded to two hydrogens, one hydroxyl group, and the other carbon, with all atoms having complete octets except hydrogen.
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