115 Exam III Fa07

115 Exam III Fa07 - llS—M re Exam 3 (Test 63) - l 1/14/07...

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Unformatted text preview: llS—M re Exam 3 (Test 63) - l 1/14/07 1. The analysis of organic molecules using infrared spectroscopy allow scientists to: (a) determine the molecular weight of a molecule. (b) determine the exact structure (all the bonds and atom placements) of the molecule. (c) separate a mixture of organic molecules. (d) determine the functional groups that are present in a molecule. (e) determine the exact number of carbon atoms present in a molecule. 2. Infrared Spectrum 1 to the right is very similar to the spectrum of four of the following compounds listed below. Spectrum 11 is that of the fifth compound. Which compound Produced Spectrum ll? \ Spectrum I Spectrum 11 ?\ increases WWW Energy increases WWW-“Mm (a) (""CHzCHz—)n (b) CH3CH3 (c) emcngcm (d) CH3CHgCHzCHgCHgCPh (e) CH3CH3CHQCH=CHCH3 llS-M w Exam 3 (Test 63) W 11/24/07 3 3. Hydrogen bonding would be expected to occur in which of the following pure substances? 0 H T l’ A.._ f \“ (ls—cm ran—H <\ 9’ “ml I. _—" 1]]. H H H H CI H H _ i wwl—cL-e-l—l—H 11. H H H H IV "— (a) in all of these substances (b) in substance Ill only (c) In substances H and III (d) In substance HI and W (e) In substance I, II and III 4. The drawing represents the formation of (a) Dipole induced dipole attractions (b) Dipole-dipole attractions ((2) Dispersion forces (d) Hydrogen bonds (e) ion—induced dipole attractions mggfi 5. Which of the following molecules has a net dipole moment? F‘II II F Fl 1' F H ‘II '3' F E'. III Illa III‘ I! I I“. In: IE===iI 333:: I." Il'l‘ 1’" Il': .J'II I'll' F "F H ' '* H F" ' H (:1) (1)} U) F.] _.H Is. all F “In F I...!."l F ((1) (e) 1 IS-M " Exam 3 (Test 63) -- 11/14/07 4 The fuel most commonly used in portable iighters is butane (Gillie). What types of 6. 10. intermolecular forces would you predict for this molecule? r (a} Hydrogen bonding and dispersion forces (b) Dipole-dipole forces and diSpersiOn forces to) lon~dipole forces and dispersion forces (d) Hydrogen bonding. dipoie-dipole forces. and dispersion forces (e) Dispersion forces A beaker contains 100 ml. of salt water. if 25 niL of water evaporates, the number of moles of NaCl: (a) does not change. (b) increases by 75%. (c) increases by 25%. (d) decreases by 25%. (e) decreases by 75%. A 0.05 m aqueous solution of a salt in a semipermeable membrane is placed in an aqueous solution containing sugars in a concentration of 0.025 in. Which statement is true? The salt solution is in osmotic equilibrium with the sugar solution because they have the same concentration when you consider that i=2 for a salt. Water will flow into the salt solution from the sugar solution. The osmotic pressure of the sail solution will increase. Water will flow into the salt solution from the sugar solution. The osmotic pressure ofthe salt solution will decrease. Water will flow out of the salt solution into the sugar solution. The osmotic pressure inside salt solution will increase. Water wiil flow out of the salt solution into the sugar solution. The osmotic pressure inside salt solution will decrease. What volume of0.153 M KCl solution is needed to provide 4.28 g ofKCl? (a) (b) (C) (d) (e) 376 ml. 48.8 mL 22.4 mL 8.78 mL 1.04 mL A solution ofan unknown nonvolatiie non—electroiyte was prepared by dissolving 0.328 g of the substance in 40.0g of CC14t-C). The boiling point ofthe resultant solution was 0.468 0C higher than the pure solvent. Calculate the molar mass of the solute. [KiJ for CCh = 5.02 OC/m] (a) (b) (C) (d) (6) 0.0114 g/mol 179 g/mol 1.31 g/mol 818 g/niol 87.9 g/inol l lS—M -- Exam 3 (Tcsi 63) 1 1/14/07 ll. The osmotic pressure of blood is 7.65 aim at 37' 0C. What mass of glucose (CGPIlZOé, molar mass : 180.2 g/niol) is needed to prepare 5.00 L of solution for intravenous injection? The osmotic pressure of the glucose solution must equal the osmotic pressure of blood. [R = 0.08206 l..‘&lil]/R101'K] (a) 1.50 g (b) 54.2 g (c) 126 g (d) 27] g (e) 2270 g Which reaction describes formation of a condensation polymer? 0 0 ll ‘3 in) Hgl‘l‘{CH2}"NH2 + m—-—-£:L—<CHQ}’c——mcr 6 9 l lS-M Exam 3 (Test 63) e HIM/07 6 13. Which of the following is not a polymer? (a) a protein (13) DNA (c) Cellulose (d) a lipid (e) PVA l4. Identify the structure of the addition polymer formed from the monomer with the structure: H CCig \ f C m C\ H / H (*1) {d} L n (e) 0633 or ea [ l Jr M'Np/‘xvx "a *’ ’“72‘v C I" - cc I3 (1:) v“ n {it} { «\EW'Fi' CE C I Ft 15. A consequence of the cell membrane being composed of lipids is that the membrane is: (a) a nonpolar molecule. (h) nonpolar on the inside and outside of the cell; polar in the middle ofthe membrane. (c) polar on the inside and outside of the eel]; nonpolar in the middle of the membrane. (d) a polymer. (e) high in energy, l l5«M Exam 3 ('l‘e3163)e 1 1/14/07 MAM 36. Which is the amino acid with a polar side chain? W) 9 {d} 9 Hzi‘d‘CHC"Ol-l HQN‘QHC“OH C H3 QHE O {I} ll { ) HEN-eHc—OH C H CH“ i o (6) {it CH3 ten-ch-oa W2 OH Hi H O fmx n t r—C - DH _______ l7. A beta pleated sheet (IS-sheet) is an example of what level of protein structure? (a) Primary structure (b) Secondary structure (C) Tertiary Structure (d) Quaternary Structure (e) All ofthe above 18. A DNA molecule {a double helix) contains 20% A. Which ofthe following sequences of nucleotides could he one ofthe two strands of DNA in the double helix? m) AAAAGGGGTC w) AAAAGGGGTT (q AAAoooTTCC w) AAAGGGGCCT m) AAAATHTGC | ES-M W Exam 3 (Test 63) m I 1/14/07 Which 11101302116? is invoived in formation of a polyester? (3) (b) (C) T o H 2N (I: C CH2 OH I CH3 CH2OH fi“ H O O H (I) OH H H H OH H\ h I / - H CHQICH (d) f I J The compound that was modified by cross—linking in lab was: (a) (b) (C) (d) (e) aspirin. nylon. PVA. I“e(phen)3 2+ . acetic acid. ...
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115 Exam III Fa07 - llS—M re Exam 3 (Test 63) - l 1/14/07...

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