It Takes 42

question 42

Multiple Choice

It takes 42.0 min for the concentration of a reactant in a first-order reaction to drop from 0.45 M to 0.32 M at 25°C.How long will it take for the reaction to be 90% complete?

• A)13.0 min
• B)86.0 min
• C)137 min
• D)222 min
• E)284 min

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Definitions:

Total Utility

The complete gratification or advantage gained from using a specific quantity of a product or service.

Marginal Utility

The additional satisfaction or utility that a consumer receives from consuming one more unit of a good or service.

Utility-maximizing

Utility-maximizing refers to a principle in economics where individuals or businesses seek to achieve the highest level of satisfaction or profit from their decisions, given their resources and constraints.

Diminishing Marginal Utility

The more of any one good consumed in a given period, the less incremental satisfaction is generated by consuming a marginal or incremental unit of the same good.