Acetone, shown here, is a common solvent and component of fingernail polish remover. Which of the following Lewis structures is acetone? 
Definitions:
Natural Monopolies
Industries where a single firm can supply a product or service to an entire market at a lower cost than two or more firms.
Marginal Cost
The financial outlay for manufacturing an additional unit of a product or service.
Average Cost
Average cost refers to the total cost of production divided by the total quantity produced, indicating the cost on a per-unit basis.
Natural Resources
Materials or substances occurring in nature which can be exploited for economic gain.
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