The Half- Life of a First- Order Reaction Is 13

question 20

Multiple Choice

The half- life of a first- order reaction is 13 min. If the initial concentration of reactant is 0.085 M, it takes min for it to decrease to 0.055 M.

• A) 0.048
• B) 11
• C) 8.4
• D) 3.6
• E) 8.2

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Definitions:

Industry Vs. Inferiority

A stage in Erik Erikson's theory of psychosocial development where children develop a sense of competence and belief in their skills or feel inferior and doubt their abilities.

Autonomy Vs. Shame

A stage in Erik Erikson's theory of psychosocial development where toddlers develop a sense of personal control over physical skills and a sense of independence, or otherwise experience shame and doubt about their abilities.

Trust Vs. Mistrust

A stage in Erik Erikson's theory of psychosocial development where infants learn whether or not they can trust the people around them.

Identity Crisis

A period of uncertainty and confusion in which a person's sense of identity becomes insecure, typically due to a change in their expected aims or role in society.