In an Unweathered Sample of Igneous Rock,the Ratio of an Unstable

question 5

Multiple Choice

In an unweathered sample of igneous rock,the ratio of an unstable isotope to its stable daughter isotope is 1/15.If no daughters were present at the time the rock cooled below closure temperature,and the half-life of the reaction is 50 million years,how old is the rock?

• A) 200 million years
• B) 400 million years
• C) 750 million years
• D) none of the above

Identify and name the major products of organic reactions involving alcohols, halides, and nucleophilic substitution.

Analyze the efficiency and selectivity of different synthetic routes in organic chemistry.

Understand the role of reaction conditions and reagents in determining the major products of organic reactions.

Apply knowledge of organic chemistry to propose synthetic pathways for complex molecules.

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