객관식
Which of the following best describes the correct Lewis structure for (dibromomethane)?
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1. A Review of General Chemistry
Lewis Structure
객관식
Which of the following best represents the correct Lewis structure for (C2H4O)?
A
A structure with an ether linkage, corresponding to dimethyl ether:
B
A structure with a carboxylic acid group:
C
A structure with a triple bond between the carbons:
D
A structure with a carbonyl group (C=O) and an ethyl group, corresponding to acetaldehyde:
검증된 단계별 안내1
Step 1: Determine the molecular formula and the number of valence electrons. For C2H4O, count the valence electrons from each atom: Carbon (4 electrons each), Hydrogen (1 electron each), and Oxygen (6 electrons).
Step 2: Consider possible structural isomers that fit the formula C2H4O. These include ethers (like dimethyl ether), aldehydes (like acetaldehyde), ketones, alcohols, and carboxylic acids. Evaluate which structures satisfy the valence and bonding rules.
Step 3: Analyze the given options by their functional groups and bonding patterns. For example, ethers have an oxygen single bonded to two carbons, carboxylic acids have a -COOH group, and aldehydes have a carbonyl group (C=O) bonded to at least one hydrogen.
Step 4: Check the bonding and hydrogen count in each proposed structure to ensure it matches C2H4O. For instance, acetaldehyde has a carbonyl group (C=O) on the first carbon and a methyl group (CH3) on the second carbon, which fits the formula and valence requirements.
Step 5: Confirm that the correct Lewis structure has the carbonyl group (C=O) and the appropriate number of hydrogens attached to the carbons, consistent with acetaldehyde, making it the best representation of C2H4O among the options.
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