객관식
Which of the following best represents the Lewis structure of methane ()?
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1. A Review of General Chemistry
Lewis Structure
객관식
Which of the following best represents the most stable Lewis structure of acrolein ()?
A
A structure with a three-carbon chain, a double bond between and , a double bond between and , and a single-bonded oxygen on , resulting in a carbon with five bonds.
B
A structure with a three-carbon chain, a double bond between and , a single bond between and , and a double-bonded oxygen (carbonyl) on , with all atoms having complete octets and no formal charges.
C
A structure with a three-carbon chain, all single bonds between carbons, and a single-bonded oxygen attached to , with one carbon having a positive formal charge.
D
A structure with a three-carbon chain, a triple bond between and , and a single-bonded oxygen on , with incomplete octets on some atoms.
검증된 단계별 안내1
Identify the molecular formula of acrolein as C\_3H\_4O and recognize that it contains a carbonyl group (C=O) characteristic of aldehydes.
Draw a three-carbon chain and place the oxygen atom bonded to the first carbon (C1), since acrolein is an aldehyde with the carbonyl at the end of the chain.
Assign a double bond between C1 and the oxygen to form the carbonyl group, ensuring that the oxygen has two lone pairs and a double bond to carbon, satisfying its octet.
Place a double bond between C1 and C2 to represent the alkene portion of acrolein, and a single bond between C2 and C3, making sure all carbons have four bonds total and complete octets.
Check formal charges on all atoms to confirm that the structure has no atoms with unusual charges and that no atom exceeds the octet rule, ensuring the most stable Lewis structure.
