03_Study Guide

03_Study Guide - Biology, 7e (Campbell) Chapter 3: Water...

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Biology, 7e (Campbell) Chapter 3: Water and the Fitness of the Environment Chapter Questions 1) In a single molecule of water, the two hydrogen atoms are bonded to a single oxygen atom by A) hydrogen bonds. B) nonpolar covalent bonds. C) polar covalent bonds. D) ionic bonds. E) van der Waals interactions. 2) The slight negative charge at one end of one water molecule is attracted to the slight positive charge of another water molecule. What is this attraction called? A) a covalent bond B) a hydrogen bond C) an ionic bond D) a hydrophilic bond E) a hydrophobic bond 3) An example of a hydrogen bond is the bond between A) C and H in methane (CH 4 ). B) the H of one water molecule and the O of another water molecule. C) Na + and Cl - in salt. D) the two hydrogen atoms in a molecule of hydrogen gas (H 2 ). E) Mg + and Cl - in MgCl 2 . 4) Water is able to form hydrogen bonds because A) oxygen has a valence of 2. B) the water molecule is shaped like a tetrahedron. C) the bonds that hold together the atoms in a water molecule are polar covalent bonds. D) the oxygen atom in a water molecule has a weak positive charge. E) each of the hydrogen atoms in a water molecule is weakly negative in charge. 1
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5) What determines the cohesiveness of water molecules? A) hydrophobic interactions B) nonpolar covalent bonds C) ionic bonds D) hydrogen bonds E) both A and C 6) What do cohesion, surface tension, and adhesion have in common with reference to water? A) All increase when temperature increases. B) All are produced by ionic bonding. C) All are properties related to hydrogen bonding. D) All have to do with nonpolar covalent bonds. E) C and D only 7) Which of the following is possible due to the high surface tension of water? A) Lakes don't freeze solid in winter, despite low temperatures. B) A water strider can walk across the surface of a small pond. C) Organisms resist temperature changes, although they give off heat due to chemical reactions. D) Water can act as a solvent. E) The pH of water remains exactly neutral. 8) Which of the following is true when an ice cube cools a drink? A) Molecule collisions in the drink increase. B) Kinetic energy in the drink decreases. C) A calorie of heat energy is transferred from the ice to the water of the drink. D) The specific heat of the water in the drink decreases. E) Evaporation of the water in the drink increases. 9) Which of the following is a correct definition of a kilocalorie? A) the amount of heat required to raise the temperature of 1 g of water by 1°F B) the amount of heat required to raise the temperature of 1 g of water by 1°C C) the amount of heat required to raise the temperature of 1 kg of water by 1°F D) the amount of heat required to raise the temperature of 1 kg of water by 1°C E) the amount of heat required to raise the temperature of 1,000 g of water by 1°F 2
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10) The nutritional information on a cereal box shows that one serving of a dry cereal has 200 kilocalories. If one were to burn one serving of the cereal, the amount of heat given off would be sufficient to raise the
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This note was uploaded on 07/03/2008 for the course BIOL 51 taught by Professor Janetkoprivnikar,greggd.jongeward during the Fall '08 term at Pacific.

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03_Study Guide - Biology, 7e (Campbell) Chapter 3: Water...

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