key_e4_s07 - Multiple Choice 2 points each 1 A solution is...

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Multiple Choice, 2 points each 1. A solution is not neutral. Which one of these statements is true? A. [H 3 O + ] = 1.0 × 10 –7 M B. [H 3 O + ] = [OH ] C. [H 3 O + ][OH ] = 1.0 × 10 –7 D. [OH ] = 1.0 × 10 –7 M E. [H 3 O + ][OH ] = 1.0 × 10 –14 2. Suppose that a gas occupies 3.11 L at 795 mm Hg and 288 K. What pressure (in atm) will the same gas exert at 5.00 L and 31.0 ° C? A. 1.85 × 10 –4 B. 0.687 C. 1.34 D. 1.02 × 10 3 E. 2.61 × 10 3 3. The normal boiling point of a liquid on a vapor pressure curve is found A. at the point where the temperature is equal to the pressure. B. at any point where the pressure is less than 760 mm Hg. C. at the point where the temperature line crosses the 760 mm Hg line. D. in the region below the curve. E. in the region above the curve. 4. How many of the following molecules or ions contain double or triple bonds? N 2 H 2 CO C 2 H 4 C 2 H 6 SCN A. 1 B. 2 C. 3 D. 4 E. 5 5. Which of the following is paramagnetic? A. B 2 B. C 2 C. H 2 D. N 2 E. At least two of the above are paramagnetic. 6. Which description is not a property of carboxylic acids? A. easily form hydrogen bonds B. react with bases to form salts C. can be produced from ketones D. are polar at the carboxyl group E. are produced by complete oxidation of primary alcohols
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7. Which of the following is a Lewis acid but not a Bronsted-Lowry acid? A. acetic acid B. NH 4 + (aq) C. HCO 3 (aq) D. CO 2 E. CO 3 2– 8. The secondary structure of a protein is defined as A. the degree of interaction among separate protein subunits. B. interactions such as ionic bonding and sulfide linkages. C. the identity and order of its amino acids. D. hydrogen bonding between C=O groups and H atoms on amine groups, forming alpha helices or beta-pleated sheets. E. the overall shape of the protein resulting from complex turns and folds. 9. Which of molecules A through D exhibits chirality? If none exhibit chirality, select E. A. CH 4 B. CH 3 OH C. CH 3 CH 2 OH D. HCC C H H H H OH H H E. none of these 10. Which of the following does not contribute to the acidity of the hydrogen atom in the carboxylic acid functional group? A. the attraction of the other atom of O for the electrons in the O-H bond B. resonance stabilization of the resulting anion C. the electronegativity of the C atom D. the lack of polarity in the C-H bonds in the rest of the molecule E. the electronegativity of the O that is bonded to the H 11. In what volume of water must 25.0 g of BaCl 2 be dissolved to yield a solution that is 0.600 M? A. 200. mL B. 240. mL C. 400. mL D. 480. mL E. 800. mL
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12. What is the molecular weight of 3.7 g of an unknown gas that occupies 450 mL at 20.0 ° C and 2.0 atm?
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key_e4_s07 - Multiple Choice 2 points each 1 A solution is...

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