studentquestion_endofsemester_key_F07

studentquestion_endofsemester_key_F07 - End of the semester...

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1. A surfactant is a substance that a. Reduces the surface tension of water and contain an hydrophobic tail b. Reduces the surface tension of water and contains a hydrophilic tail c. Reduces the surface tension of water and contains a hydrophobic tail and hydrophilic head d. None of the above. 2. All soaps are a. Surfactants b. Detergents c. Both a and b d. None of the above 3. Which acid is not found in water a. Carbonic acid b. Nitric acid c. Sulfuric acid d. Citric acid 4. In order for water to be considered soft its ppm count must be in a range of a. 0 – 17.1 b. 17.1 – 60 c. 60 – 120 d. 120 – 180 5. Why is it possible for it to be too cold to snow? a. Water stays solid at low temps b. Very little water enters the air from bodies of water c. Less water vapor in the atmosphere means less clouds d. All of the above 6. Why is hard water an issue for homeowners a. Calcium carbonate build up can clog pipes b. It scratches dishes c. It’s not safe to drink d. None of the above 7. Lye soap is also known as a. Animal fat b. A certain form that can change into a detergent
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This homework help was uploaded on 04/03/2008 for the course CHEM 101 taught by Professor Hawrelak during the Fall '07 term at Bloomsburg.

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studentquestion_endofsemester_key_F07 - End of the semester...

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