A constant 14 C/ 12 C ratio is given. The counts per min per gram of a petrified tree are given. Age of the tree is to be determined. Concept introduction: Radiocarbon dating is based on the radioactivity of the nuclide 6 14 C which decays by beta particle production. In the process of radiocarbon dating, the ratio of radio carbon to the stable carbon in the sample is studied. To determine: The age of the given tree.

Question

13. (11pts total) Consider the arrows pointing at three different carbon-carbon bonds in the molecule depicted below. Bond B Bond A Bond C a. (2pts) Which bond between A-C is weakest? Which is strongest? Place answers in appropriate boxes. Weakest Bond Strongest Bond b. (4pts) Consider the relative stability of all cleavage products that form when bonds A, B, AND C are homolytically cleaved/broken. Hint: cleavage products of bonds A, B, and C are all carbon radicals. i. Which ONE cleavage product is the most stable? A condensed or bond line representation is fine. ii. Which ONE cleavage product is the least stable? A condensed or bond line representation is fine. c. (5pts) Use principles discussed in lecture, supported by relevant structures, to succinctly explain the why your part b (i) radical is more stable than your part b(ii) radical. Written explanation can be no more than one-two succinct sentence(s)! Google

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Question

Chapter 18, Problem 38E

Interpretation Introduction

Interpretation: A constant 14C/12C ratio is given. The counts per min per gram of a petrified tree are given. Age of the tree is to be determined.

Concept introduction: Radiocarbon dating is based on the radioactivity of the nuclide 614C which decays by beta particle production.

In the process of radiocarbon dating, the ratio of radio carbon to the stable carbon in the sample is studied.

To determine: The age of the given tree.

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