Bundle: Organic Chemistry, 9th, Loose-Leaf + OWLv2, 4 terms (24 months) Printed Access Card
Bundle: Organic Chemistry, 9th, Loose-Leaf + OWLv2, 4 terms (24 months) Printed Access Card
9th Edition
ISBN: 9781305701021
Author: John E. McMurry
Publisher: Cengage Learning
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Chapter 31.SE, Problem 17MP
Interpretation Introduction

Interpretation:

Draw the structure of representative unit of polyurethane.

Concept introduction:

We can make polyurethanes with the help of two monomers diols and isocyanates. Polyurethanes are used as hard varnish and furniture coatings to soft flexible pillows. This type of reaction can be carried out with the help of nucleophilic substitution reaction.

In this reaction, a nucleophile (negatively charged molecule) attacks on the monomer unit to give rise to a reactive intermediate. This intermediate again reacts with the monomer unit to give rise to the final polymeric product and releases nucleophile.

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There are 48 pairs of students in the following table. Each pair has quantitatively determined the mass of taurine in a 250 mL can of the popular energy drink marketed as “Munster” using High Performance Liquid Chromatography (HPLC). The class results are presented below:  QUESTION: Summarise and report these results including an indication of measurement uncertainty.  In both calculation samples calculate if an outlier is present, max value, number of samples, mean, standard deviation, g (suspect), g (critical) and t (critical).   Mass of Taurine (mg) Mass of Taurine (mg) (Table continued) 152.01 152.23 151.87 151.45 154.11 152.64 152.98 153.24 152.88 151.45 153.49 152.48 150.68 152.33 151.52 153.63 152.48 151.68 153.17 153.40 153.77 153.67 152.34 153.16 152.57 153.02 152.86 151.50 151.23 152.57 152.72 151.54 146.47 152.38 152.44 152.54 152.53 152.54 151.32…
Indicate the rate expressions for reactions that have order 0, 1, and 2.
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