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MTII.key - Chem 142A Second Midterm Examination 16 November...

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Chem 142A Second Midterm Examination 16 November 2009 First letter of your last name: First Name: ___________________ Last Name: ________________________ Gas constant R = 8.314 J/molK Avogadro’s number N A = 6.023 x 10 23 particles/mol Pla nck’s Constant h = 6.022 x 10 -23 J s Speed of light c = 3 x 10 8 m/s Mass of Electron m e = 9.109 x 10 -31 kg 1. There are (should be) six questions on this exam (please check). Unless otherwise denoted each is worth 15 points, for a total of 100 points. 2. Partial credit will be given for answers that are on the right track but not completely correct. However, the ability to recognize when you do not know something is an invaluable scientific skill. Therefore, if you are certain that you do not know enough about a given answer to receive at least 3 points partial credit, write “I DO NOT KNOW” (and only this) and you will receive 3 points partial credit.
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1. Draw the Haworth projection of the disaccharide D-glucose 1->4 D-glucose (also know as cellobiose). Is this a reducing sugar? If so, denote the reducing
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MTII.key - Chem 142A Second Midterm Examination 16 November...

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