A Certain First-Order Reaction a → B Is 25% Complete

question 122

Multiple Choice

A certain first-order reaction A → B is 25% complete in 42 min at 25°C. What is the half-life of the reaction?

• A) 21 min
• B) 42 min
• C) 84 min
• D) 120 min
• E) 101 min

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Definitions:

Product Signal

An indicator or marker that conveys information about the qualities or characteristics of a product to consumers.

Simple Additive Decision Rule

A decision-making process in which options are evaluated by summing up the merits or scores of their attributes, simplifying the choice among multiple alternatives.

Decision Rules

Guidelines or criteria used by consumers or individuals in making choices among various alternatives.

Ethnocentrism

The belief in the superiority of one's own ethnic group or culture, often leading to judgment of other cultures solely by the values and standards of one's own culture.