chem128 F03 ExamI - CHEM128(Maxwell Fall 2003 Blue Sheet...

Info icon This preview shows pages 1–3. Sign up to view the full content.

Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: CHEM128 (Maxwell) Fall 2003 Blue Sheet for Exam I f\\_/_ This sheet is due at the time you pick up your exam on October 9, 2003. Think of i your ticket to Exam I. You will turn this in and pick up your exam. This sheet is worth 1 1 points, your Oct. 9 exam will be worth 90 points. Blue sheets ed in a the exam eri will not be gr_aded. Blank “Blue Sheets” will be available at the exam. This “Blue Sheet” will be graded for free (no penalty points) up until 6:00 PM on Wednesday, Oct. 8. See me during office hours, etc, or most any time my door is open. ; Part I. Consider Figure 13. 1. Which is the strongest of the intermolecular forces listed . between the solute and the solvent for each solution? (one point) l A KBrinliquid water M ~. B. CH3OHinCBr4 . o 1 cc ' ole; _ C. Glucose (see structure on p. 645) in liquid water ifs/Wig D. Neon gas in C6H14 diggersioh gfgflgé News) nonpolur Part II. Solution Thermochem. 5V1 - «AH uk’ou; t QWMAH fill W m Use the following data to determine the com “finned heats of hydration for the 1on5 in potassium hromate (KBr03) AHlmce" — -745 kJ/mol AHsmn -— 41.1 kJ/mol Momma (files/"‘01::(745H/moD-1—bl-ltgcl Y’J ‘ Part III. Colligative propertifi 7 O 4* g [m '3 l @“A P‘ l“) A p A. The osmotic pressure in the red blood cell is essentially equal to 0.15 Molar NaCI, also known as physiological saline. What is the osmotic pressure in the red blood cell at 37°C in atm. ? (2 points) Part IV. oncentration units B. A 50.0% solution of sulfuric acid (HZSO4) 1n water has density of 1.395 g/mL. If possible, determine the molality, the molarity and the mole (fr-7031M of this solution. or logic for full or partial credit. 3 points)( , a . 1 11 1 l0 L malt m _ , L Silh EM I molt Tia-STOW Hf mole fraction W W over «3141- W l m. l CHEM128 (Maxwell) Fall 2003 Blue Sheet for Exam I page 2 Part V. Biochemistry A. (33 . l ‘1\»~\, 6’33) g ll?) 7... \J «.73 - t, Read carefully the Chemical Connections on pp. 490-91. Be sure you understand the mode of action of soaps and detergents. Focus particularly on the gramicidin A section. Gramicidin A is a polypeptide, a polymer of amino acids, the building blocks of protein in living systems. See representative structures of amino acids on page 646. Note, the portions in grey become the peptide backbone, the yellow portions, or the “R” groups, characterize the solubility properties of the individual sections of a polypeptide. A polypeptide is shown on p. 647. I In class, we discussed the nature of the polypeptides as they relate to membranes, etc. The yellow coil shown on p. 491 can be thought of as a helical polypeptide (actually, note, it is two polypeptides end to end). With reference to p. 646, and to p. 491, list at least four amino acids that might be found inthat particular region as labeled in the figure. (3 points) 1.Nonpolar exterior of Gramicidin A gnaw (ilk—WW 51 "N; Uuuhb 2. Polar mterior of Gramicidin A 530’an Cg‘al’vi N/ibdglmm/ (1%an 3. The end portion of the yellow coil that is hanging down into the blue area of the figure on p. 491. Emma; flmfhan mparljc gufiimwdd ...
View Full Document

  • Summer '03
  • Maxwell

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern