A Biochemist Studying the Breakdown in Soil of the Insecticide

question 34

Multiple Choice

A biochemist studying the breakdown in soil of the insecticide DDT finds that it decays by a first order reaction with a half-life of 12.0 years. What is the rate constant, k , for this first order process?

• A) k = 0.0578 yr ^{- 1}
• B) k = 6.00 yr ^{- 1}
• C) k = 8.32 yr ^{- 1}
• D) k = 17.3 yr ^{- 1}
• E) k = 24.0 yr ^{- 1}

Recognize the groups and categories within the periodic table, including the halogens and noble gases.

Understand the basics of alloy composition and the distinction between mixtures and compounds in context.

Identify the environmental and health implications of specific chemicals found in water sources.

Understand the basic growth patterns in plant embryos.

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Geneva

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