1. Condensation -      Answer

2. __Answer_____ is the pressure that develops in a closed container when a liquid and gas are in a state of dynamic equilibrium.

3. Sublimation -      Answer

4. __Answer__ is a substance which speeds up a reaction without being changed itself

5._Answer_  is the energy barrier that must be overcome for a reactant to be converted to product.

6. Mole -      Answer

7._Answer_  is an ion that does not take part in a reaction.

8. Weak acid -      Answer

9. _Answer_ is the splitting apart of compounds in solution.

10. Electrolyte-      Answer

Part B. Concepts

1. There are two factors that influence the pressure a gas exerts. Very specifically, what are they? (4 points)      Answer

2. How can you purify natural gas that is contaminated with water? Hint- the answer was in the "Matter of State" movie shown 29 October. (4 points)    Answer

3. Explain what the following postulate of the kinetic molecular theory (KMT) means: Collisions between particles are elastic. (3 points)    Answer

4. Describe a solid in terms of the KMT. (3 points)    Answer

5. List the three ways to control reaction rate and explain what effect a change in these variables has. (6 points)     Answer

6. Construct a table of the definitions of acids and bases. (6points)    Answer

7. In the following balanced reaction, identify the acid, base, conjugate acid and conjugate base. (4 points)      Answer

                                       H₃BO₃ + NH₃ ----> NH₄⁺ + H₂BO₃^-

8. Explain what causes a molecule to have London forces, dipole-dipole interactions or hydrogen bonds. Your explanation should include the basis of the interaction as well as the strength of interaction and which molecules have them. (6 points)      Answer

9. Which one of the following three molecules would be most likely to be a gas at room temperature? (4 points)     Answer

     C₆H₁₄          CH₃COOH          CaC1₂

10. Indicate whether the following molecules should be soluble in water. (3 points)      Answer

     C₆H₁₄          CH₃COOH          CaC1₂

11. Indicate which intermolecular forces are present in the following molecules. (3 points)      Answer

          London forces          Dipole-dipole interaction          Hydrogen bond

SiO₂             _______                  _______                  _______

CH₂F₂         _______                  _______                  _______

12. A 325 mL sample of gas exerts a pressure of 7.25 atm at a temperature of 21.0^oC. What volume will the gas occupy ifthe temperature is increased to 35.0^oC and the pressure is increased to 4.31 atm? (4 points)    Answer

Part C. Multiple choice (2 points each). Circle the best answer.

1. The state in which molecules have the highest velocity is
a. solid
b. liquid
c. gas
d. plasma
      Answer

2. The intermolecular forces acting between 2 molecules of NC1₃ is(are)
a hydrogen bond
b. dipole-dipole
c. London force
d. "c" and "b"
e. "a" and "b" and "c"
      Answer

3. The intermolecular forces acting between 2 molecules of HF is(are)
a. hydrogen bond
b. dipole-dipole
c. London force
d. "c" and "b"
e. "a" and "b" and "c"
      Answer

4. The state in which density is highest is
a. solid
b. liquid
c. gas
d. plasma
      Answer

5. The atmosphere is a mixture of 2l% O₂, 350 ppm CO₂, 78% N₂, and a variety of other trace gasses. The solvent is
a. O₂
b. CO₂
c. N₂
d. something else
      Answer

6. Of the following molecules: O₂ CO₂, N₂ and Br₂; the molecule with the highest boiling point is:
a. O₂
b. CO₂
c. N₂
d. Br₂
      Answer

7. If a sample of gas occupies 765 mL at 31.0^oC, what volume will it occupy at 75.0^oC, assuming the pressure remains constant?
a. 185 mL
b. 316 mL
c. 976 mL
d. 668 mL
      Answer

8. The correct coefficients for the following reaction are
                     C₆H₁₄ + O₂ ----> CO₂ + H₂O
a. 1, 13, 6, 7
b. 1, 19, 6, 7
c. 2, 19, 12, 14
d. none of the above
      Answer

9. The molar mass of Na₂SO₄ is
a. 71.0 g/mol
b. 94.0 g/mol
c. 119.0 g/mol
d. none of the above
      Answer

10. If l begin the following reaction with 1.5 mol CaO, what is the most product I can end up with?
                            CaO(s) + H₂O (1) ----> Ca(OH)₂
a. 1.5 mol
b. 1 mol
c. 3. mol
d. none of the above
      Answer

11. The number of moles of hydrogen in 32.0 g water is
a. 1.8
b. 3.6
c. 2.0
d. none of the above
      Answer

12. The Keq for a reaction is 1.8 x 10^-5. At equilibrium, there will be
a. more reactant than product
b. more product than reactant
c. equal amounts of product and reactant
d. I need more information to answer this question
      Answer

13. If I begin the following reaction with 0.2 mol Sn, how many grams SnO₂ should I end up with?
                                              Sn + 2 HNO₃ --> N₂O₄ + SnO₂
a. 23.74
b. 26.94
c. 30.14
d. 33.34
      Answer

14. A strong acid is
a. NH₃
b. NaOH
c. HCl
d. H₃PO₄
      Answer

15. A weak base is
a. NH₃
b. NaOH
c. HCl
d. H₃PO₄
      Answer
 
 

http://counter.digits.com