PracticeExam1 - Practice for the first hourly examination...

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Practice for the first hourly examination in BISC 220     January 2007 Answers are given for about half of the questions.  Answers to the remaining questions are available in  the text. The following 28 multiple choice questions are worth 3 points each.  Please CLEARLY write your  answer in the left hand margin box.   1.  Using the information in the abbreviated periodic table ( above ), how many neutrons does the nucleus  of a nitrogen atom contain?  a. 2  b.  7  c.  8  d.  14  e.  21  2.  When two atoms are equally electronegative, they will interact to form  3.  What do cohesion, surface tension, and adhesion have in common with reference to water?  bonding.  4.  The figure above shows a solute molecule surrounded by a hydration shell of water.  Based on your  knowledge of the polarity of water, the solute molecule is most likely  5.  Assume that acid rain has lowered the pH of a particular lake to pH 5.0. What is the hydroxide ion  concentration of this lake?  a. 1 x  10 -5  mol of hydroxide ion per liter of lake water  b. 1 x  10 -9  mol of hydroxide ion per liter of lake water  c. 5.0  M  with regard to hydroxide ion concentration 
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Practice for the first hourly examination in BISC 220     January 2007 Answers are given for about half of the questions.  Answers to the remaining questions are available in  the text. d. 9.0  M  with regard to hydroxide ion concentration  e. Both B and D are correct. 
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Practice for the first hourly examination in BISC 220     January 2007 Answers are given for about half of the questions.  Answers to the remaining questions are available in  the text.
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