Sbs (polystyrene-polybutadiene) is a block co-polymer, it is considered a thermoplastic elastomer and is produced by living anionic polymerization a. briefly explain the underlined terms b. list the two molecular characteristics that are essential for elastomers 4 c. 141 explain how block polymers are produced, show initiation and propagation steps for the formation of styrene block only. explain how the block structure of sbs results in a polymer exhibiting both elastomeric mechanical properties and thermoplastic processability.

Which element is the least metallic between cadmium, silver, zinc, or iron?

Which of these is an example of pseudoscience? a) predicting the time of sunrise based on data on position of earth b) predicting the date of the moon phases based on data on position of earth c) predicting eclipses based on the position of the sun and the moon d) predicting future events in a person's life based on the position of the moon

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .