CHEM 131 Final Exam

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1. Having learned about electromagnetic radiation in this lesson, which of these statements
about it is true?
2. In terms of wavelength, which of these is the longest?
3. Which of the following statements is true about atomic size?
4. Geometrically linear means that the electron groups have what angle?
5. Geometrically trigonal planar means that the electron groups have what angle?
6. Some atoms are better at attracting electrons compared to others. Which term below best
describes that?
7. You have been given a 0.325 L canister containing a gas. The pressure gauge on the canister
reads 721 mmHg, and the temperature gauge reads 305.15 K. The piston on the canister was
pushed to compress the gas to 0.286 L, thereby increasing the pressure to 901 mmHg. What is
the new temperature in Celsius? Remember sig figs.
8. I have a pressure cooker in my underground lair that is brewing a diabolical solution. I set
everything up and went upstairs, but forgot to write down the initial temperature. I know the
starting volume was 1.00 L. When I came downstairs later to check on it, I see that the volume
increased to 1.10 L, and thermometer read that the temperature was now 528.15 K. What was
the starting temperature when I left (in °C)?
9. Think back to Lesson one when we talked about density. Now think about it--my kids love
balloons, and then are always laying around the house. Suppose one was laying by the window
at night when they went to bed, but the next day, when the sun came up, it warmed the gas (air)
that was in the balloon. What would be true about the density of the air in the balloon?

2. 10. A liquid generally wants to decrease the area of its surface as much as possible. The natural
tendency to do this is known as what?
11. When you put water into an ice cube tray and stick it in the freezer to make ice, which of
these is true?
12. Most people don't realize that once something starts to melt, cranking up the heat does't
make the temperature of the substance higher, at least not until it is ALL melted. When you add
lots of extra heat to a solid that is in the process of melting, what ends up happening to all of this
extra energy you are adding? It is used to do what?
13. 'Which of these statements is true regarding a gas's ability to dissolve in water? It
14. 'Suppose you have a 0.10 M solution of AlBr​3​. What is the concentration of each ion
15. Suppose you want to prepare a 2.50 M solution of sodium chloride. If you only have 0.325
moles of sodium chloride, and you must use it all, how many mL must you prepare?
16. Suppose you have a sample of HC​2​H​3​O​2​ with a concentration of 2.0 M. So, what would be
the [H​+​
]?
17. We discussed many properties and characteristics of acids in this lesson. Which of the
following is NOT one that was mentioned?
18. In this lesson we learned about K​w​, which is known as the the ion product constant for water.
What is this value?
19. We discussed several different types of hydrocarbons in this lesson. Which one is saturated?
20. We discussed different types of organic reactions in this lesson, one of which was addition.
Which if these will undergo this type of reaction?
21. Endings (suffixes) in the naming process can tell us a lot about a chemical. For example, a
compound named "butanal" would be categorized as a(n):

3. 22. We discussed different structures of proteins (primary, secondary, etc.). When considering
the secondary structure, what is the repeating pattern that is commonly found along this chain?
23. Of the different protein structures discussed in this lesson, which actually gives the
short-range repeating patterns?