Exam 4                                                                                                            Chem100

Spring, 2005                                                                                                   Dunnivant

 

 

 

**NO SPARE PAPER IS ALLOWED OUT DURING THE EXAM.  USE THE BACK OF YOUR EXAM AS NEEDED.  YOU MAY NOT LEAVE THE ROOM OTHER THAN TO GO TO THE RESTROOM OR A SCHEDULED CLASS.  LEAVE YOUR EXAM AT THE FRONT DESK IN THIS ROOM IF YOU LEAVE.

 

**POINTS WILL BE TAKEN OFF FOR SLOPPY WORK WHEN I CANNOT FIND YOUR ANSWER OR FIGURE OUT WHAT YOUŐRE DOING.  IF YOUŐRE A MESSY PERSON, I STRONGLY SUGGEST WORKING YOUR PROBLEM ON THE BACK OF A PAGE AND COPYING YOUR WORK NEATLY INTO THE SPACE PROVIDED FOR THE PROBLEM.

 

Closed book, closed notes, closed neighborÉ. YouŐre on your own!

 

Name:  (printed) _________________________

I have neither given nor received aid on this exam.  ___________________(signature)

 

 

  1. (10 pts) Explain what an LD50 is and how we obtain it.  Draw a plot to illustrate your point.  Also name one compound with a low LD50 and one with a high LD50.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. (5 pts)  Draw a typical risk versus dose plot for a radionuclide (carcinogen) chemical and explain the concept of a no-threshold carcinogen.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. (5 pts)  List four modes of action for a toxic pollutant.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. (10 pts)  Define teratogen, mutagen, and cancinogen.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. (15 pts)  Draw a municipal landfill and label all of its parts.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. (15 pts)  Draw a hazardous waste landfill and label all of its parts.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. (20 pts)  Calculate the gaseous volume of CO2 (in liters) for burning a 13.0 gallons of gasoline.  Assume that the gasoline is mostly present as isooctane (C8H18), 1.00 gallon = 3.78 L, 1000 mL/L, and the density of the gasoline = 0.85 mL/g.

a) Draw a complete flow chart

      b) Calculate the volume of CO2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. (10 pts)  Integrate the figures that show the range pf photons coming to Earth and the photons leaving the Earth in one figure the illustrates global warming.  GIVE an explanation of your figure explaining how greenhouse gases retain heat in the atmosphere.  There is one particular figure that I am looking for.  This should be obvious.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. (10 pts)  You have finished another wonderful semester at Whitman and you flying home.  On the plane you start talking to the loser next to you and you find out that he/she is a lobbyist for the ExxonMobile oil company.  You state discussing human-caused global warming and they state that global warming is a natural process and we are not doing anything to cause it.  Yes, they say CO2 levels are increasing but itŐs natural and that atmospheric temperatures will not or only slightly increase and itŐs natureŐs way.  You only have one small piece of paper that will only hold one data plot.  Draw the most convincing data plot to show that the lobbyist is wrong, and in the space provided below, explain your diagram and argument.