09:40 Mar 16, 2006 |
English language (monolingual) [PRO] Tech/Engineering - Chemistry; Chem Sci/Eng | |||||||
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| Selected response from: Jörgen Slet Estonia Local time: 17:15 | ||||||
Grading comment
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SUMMARY OF ALL EXPLANATIONS PROVIDED | ||||
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4 +4 | monomer component |
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4 +3 | the mollecule of a certain substance that will form a polymer |
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5 +2 | simple chemical compound of low molecular weight that can be polymerized |
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4 +2 | a part constructed of a monomer material |
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3 +2 | part of the cement containing the basic synthetic unit of polymorization |
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the mollecule of a certain substance that will form a polymer Explanation: In chemistry, a monomer (from Greek mono "one" and meros "part") is a small molecule that may become chemically bonded to other monomers to form a polymer. http://en.wikipedia.org/wiki/Monomer so in the case of cement: The liquid monomer component is comprised of methyl methacrylate, N.N-dimethyl-p-toluidine, and hydroquinone. the powder copolymer component is made of: Erythromycin (as glucoheptonate USP) 500 mg Colistin sulphomethate sodium EP http://www.medsafe.govt.nz/Profs/Datasheet/Simplexcement.htm |
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