Organic Chemistry Exam help

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Organic Chemistry Exam Help

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Problem 1 For each of the following polymers, draw the 3-D structure of all stereoisomers that would exhibit true optical activity.

2 Calculate the number average molecular weight (M.), weight average molecular weight (NT„) and polydispersity index (PDI) of a polymer sample created by mixing 1 mole of a 50,000 g/mole polymer chain with 1 mole of a 150,000 g/mole polymer chain. Assume both polymers to be monodisperse. 3. Show the structure of a tripeptide that would.... a. adsorb onto a positively charged surface at pH > 10 and adsorb onto a negatively charged surface over the pH range of 2.0-6.0. b. form inter-molecular covalent crosslinks c. be a building block of a a-helix 4. An analysis of a meteor that impacted the earth reveals the presence of both D and L amino acid optical isomers. Speculate as to whether or not this meteor came from a planet that supported life and explain the basis for your speculation.. liveexamhelper.com


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