1. Chemistry 2009 Released Test

2. 1. Which of these would be best to measure 12.6 mL of liquid ethanol? 1234567891011121314151617181920 21222324252627282930 1.25 mL beaker 2.25 mL volumetric flask 3.25 mL Erlenmeyer flask 4.25 mL graduated cylinder

3. 2. 1234567891011121314151617181920 21222324252627282930 1.At STP, potassium is in the solid phase, but argon is a gas. 2.It is easier for a potassium atom to lose an electron than it is for an argon atom. 3.The most common isotopes of argon have more protons than the most common isotopes of potassium. 4.The most common isotopes of potassium have fewer neutrons than the most common isotopes of argon.

4. 3. Which of the following is the correct Lewis electron-dot diagram for the sodium atom? 1234567891011121314151617181920 21222324252627282930 1. 2. 3. 4.

5. 4. A compound has a mass of 2.6632 x 10 2 g/mol. The number of significant figures in this mass is -- 1234567891011121314151617181920 21222324252627282930 1.2 2.4 3.5 4.7

6. 5. 1234567891011121314151617181920 21222324252627282930 1.1, 3, 2, 3 2.0, 2, 2, 3 3.1, 2, 2, 2 4.2, 6, 4, 3

7. 6. The correct formula for dinitrogen pentoxide is - 1234567891011121314151617181920 21222324252627282930 1.N 2 O 5 2.N 5 O 3.NO 5 4.N 2 O

8. 7. When ionic compounds are named, the name of a monatomic anion will end in which of the following suffixes? 1234567891011121314151617181920 21222324252627282930 1.-ic 2.-ite 3.-ate 4.-ide

9. 8. When 1 g of sodium chloride (NaCl) is placed in 100 g of water, a solution results. Once the solution is prepared, water is now considered what part of the solution? 1234567891011121314151617181920 21222324252627282930 1.Solid 2.Liquid 3.Solute 4.Solvent

10. 9. What is the name of the compound with the formula PCI 5 ? 1234567891011121314151617181920 21222324252627282930 1.Phosphorus(I) chloride 2.Phosphorus(V) chlorine 3.Phosphorus pentachlorate 4.Phosphorus pentachloride

11. 10. How many electrons does the iron have when it forms the ionic compound FeCl 3 ? 1234567891011121314151617181920 21222324252627282930 1.20 2.23 3.26 4.29

12. 11. Covalent bonds mainly occur between -- 1234567891011121314151617181920 21222324252627282930 1.Two nonmetallic elements 2.Two metallic elements 3.One metallic element and one nonmetallic element 4.One metalloid and one metallic element

13. 12. 1234567891011121314151617181920 21222324252627282930 1.4.39 mL 2.4.41 mL 3.4.55 mL 4.5.61 mL

14. 13. If substance X is a liquid, substance Y is a gas, and substance Z is a solid, and all are at the same temperature and pressure, then the order of increasing strength of their intermolecular forces would be -- 1234567891011121314151617181920 21222324252627282930 1.X < Y < Z 2.Y < X < Z 3.Z < Y < X 4.Y< Z < X

15. 14. If a sample has a mass of 1.25 X 10 2 g and a volume of 51 mL, what is its density? 1234567891011121314151617181920 21222324252627282930 1.0.00025 g/mL 2.0.0125 g/mL 3.2.5 g/mL 4.250 g/mL

16. 15. What is the empirical formula of the compound with the molecular formula C 6 H 12 ? 1234567891011121314151617181920 21222324252627282930 1.CH 2.CH 2 3.CH 4 4.C 2 H 6

17. 16. 1234567891011121314151617181920 21222324252627282930 1.Adding salt to the water 2.Increasing the temperature of the water 3.Increasing the pressure of the air above the water 4.Increasing the humidity of the air above the water

18. 17. 1234567891011121314151617181920 21222324252627282930 1.It has the same number of neutrons as potassium. 2.It is a transition metal from the same period as potassium. 3.It is one of the heaviest elements in potassium’s group. 4.It is a mix of three unstable isotopes of potassium.

19. 18. 1234567891011121314151617181920 21222324252627282930 1.1.28 g 2.2.55 g 3.3.85 g 4.32.5 g

20. 19. The product in a balanced reaction is 4Al 2 O 3. Which of the following shows the number of aluminum and oxygen atoms in 4Al 2 O 3 ? 1234567891011121314151617181920 21222324252627282930 1.8 atoms of aluminum and 3 atoms of oxygen 2.6 atoms of aluminum and 3 atoms of oxygen 3.8 atoms of aluminum and 12 atoms of oxygen 4.6 atoms of aluminum and 7 atoms of oxygen

21. 20. 1234567891011121314151617181920 21222324252627282930 1.Battery acid 2.Black coffee 3.Baking soda 4.Drain cleaner

22. 21. Which of these is most likely to form between elements transferring electrons to form oppositely charged particles? 1234567891011121314151617181920 21222324252627282930 1.A metallic bond 2.A hydrogen bond 3.A covalent bond 4.An ionic bond

23. 22. Which of the following is a chemical change? 1234567891011121314151617181920 21222324252627282930 1.Salt is dissolved in water. 2.Water is boiled on a stove. 3.Gasoline combusts in an engine. 4.Copper metal is stretch into a long wire.

24. 23. 1234567891011121314151617181920 21222324252627282930 1.Aluminum 2.Glass 3.Carbon dioxide 4.Water

25. 24. What is the volume occupied by 51.0 g of ammonia (NH 3 ) gas at STP? 1234567891011121314151617181920 21222324252627282930 1.0.439 L 2.22.8 L 3.67.2 L 4.91.9 L

26. 25. 1234567891011121314151617181920 21222324252627282930 1.Argon 2.Benzene 3.Mercury 4.Water

27. 26. A student hypothesizes that bromine (Br) has different chemical properties from krypton (Kr). The periodic table supports this hypothesis by indicating that -- 1234567891011121314151617181920 21222324252627282930 1.bromine is a metal while krypton is a nonmetal 2.one mole of bromine is heavier than one mole of krypton 3.bromine and krypton are members of the same family 4.bromine and krypton have different numbers of valence electrons

28. 27. A mixture of gases with a pressure of 800 mm Hg contains 10% oxygen and90% nitrogen by volume. What is the partial pressure of the pressure of the oxygen gas in the mixture? 1234567891011121314151617181920 21222324252627282930 1.10 mm Hg 2.80 mm Hg 3.700 mm Hg 4.800 mm Hg

29. 28. Which graph best shows the relationship between the volume of a gas and its temperature as the gas pressure remains constant? 1234567891011121314151617181920 21222324252627282930 1. 2. 3. 4.

30. 29. One example of an ionic compound is -- 1234567891011121314151617181920 21222324252627282930 1.F 2 2.CO 2 3.HBr 4.MgCl 2

31. 30. 1234567891011121314151617181920 21222324252627282930 1.Letting the chemical evaporate by blowing fans on the spill 2.Diluting the chemical with water, absorbing the liquid with inert material, and disposing of it in the trash 3.Wiping up the chemical using paper towels and disposing of them in the trash 4.Absorbing the chemical with inert material and disposing of it in a chemical waste container

32. 31. Le Chatelier’s principle describes what happens to a system in equilibrium when a stress occurs. All of the following could shift an equilibrium EXCEPT — 1234567891011121314151617181920 21222324252627282930 1.Changing the pressure on the system 2.Changing the temperature of the system 3.Changing the identity of the catalyst 4.Changing the concentration of one of the components

33. 32. 1234567891011121314151617181920 21222324252627282930 1.Precipitation 2.Neutralization 3.Single replacement 4.Double replacement

34. 33. Hydrogen chloride is a covalent compound. Which is a correct Lewis dot structure for HCI? 1234567891011121314151617181920 21222324252627282930 1. 2. 3. 4.

35. 34. Which is the best use for a fume hood? 1234567891011121314151617181920 21222324252627282930 1.Storing glassware 2.Removing toxic vapors 3.Covering volatile compounds 4.Mixing chemicals that release O 2

36. 35. Which of the following equations is balanced? 1234567891011121314151617181920 21222324252627282930 1. 2. 3. 4.

37. 36. 1234567891011121314151617181920 21222324252627282930 1.0.540 J 2.1.50 J 3.1350 J 4.1670 J

38. 37. 1234567891011121314151617181920 21222324252627282930 1.Single-replacement 2.Double-replacement 3.Synthesis 4.Decomposition

39. 38. 1234567891011121314151617181920 21222324252627282930 1.1 2.2 3.3 4.4

40. 39. 1234567891011121314151617181920 21222324252627282930 1.16 grams 2.18 grams 3.36 grams 4.44 grams

41. 40. An example of a chemical property is -- 1234567891011121314151617181920 21222324252627282930 1.Mass of a substance per unit volume 2.Ability to dissolve in solution 3.Point where solid becomes liquid 4.Tendency to undergo oxidation

42. 41. Students want to separate and compare the components of black ink and green ink. Which technique is the best for the students to use. 1234567891011121314151617181920 21222324252627282930 1.Chromatography 2.Decanting 3.Filtration 4.Evaporation

43. 42. When 80 g of sodium hydroxide, NaOH, are dissolved in enough water to make 500 mL of solution, the molarity of the solution is -- 1234567891011121314151617181920 21222324252627282930 1.1 M 2.2 M 3.4 M 4.8 M

44. 43. What is the name for the compound CaSO 4 ? 1234567891011121314151617181920 21222324252627282930 1.Calcium sulfate 2.Calcium sulfide 3.Calcium sulfur oxide 4.Calcium sulfur oxygen

45. 44. If the pH of a solution is 4, what is the pOH? 1234567891011121314151617181920 21222324252627282930 1.0 2.6 3.7 4.10

46. 45. 1234567891011121314151617181920 21222324252627282930 1. 2. 3. 4.

47. 46. 1234567891011121314151617181920 21222324252627282930 1.One phase change 2.Two phase changes 3.Three phase changes 4.No change in phase

48. 47. Which of these best describes the basis on which new scientific ideas are accepted or rejected? 1234567891011121314151617181920 21222324252627282930 1.Popular support 2.Historical support 3.Compelling evidence 4.Moral and ethical beliefs

49. 48. Based on its position in the periodic table, the element sulfur would be expected to have how many valence electrons? 1234567891011121314151617181920 21222324252627282930 1.4 2.6 3.8 4.16

50. 49. The number of molecules in 48.0 grams of oxygen gas (O 2 ) is -- 1234567891011121314151617181920 21222324252627282930 1.6.02 x 10 23 2.9.03 x 10 23 3.1.20 x 10 24 4.1.81 x 10 24

51. 50. A student determined that the density of a sample of tin is 8.00 g/mL, when the actual density of tin is 7.28 g/mL. What was the percent error in the student’s calculation? 1234567891011121314151617181920 21222324252627282930 1.0.72% 2.9.0% 3.9.9% 4.91%