PLEASE DO NOT WRITE ON THIS TEST! THANK YOU!!

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1 AP Chemistry Test (Chapter 1) Cross Country Name Please Use the Answer Sheet PLEASE DO NOT WRITE ON THIS TEST! THANK YOU!! Multiple Choice (60%) 1) A balloon is filled with air and then tied off (sealed). It is placed in ice water. Which one will occur? A) The mass remains constant, the volume increases and the density decreases. B) The mass remains constant, the volume decreases and the density increases. C) The mass increases, the volume decreases and the density increases. D) The mass remains constant, the volume decreases the density remains constant. E) None of these will occur. 2) A 6-L Erlenmeyer flask originally contains g air. 2 ml of O 2 is injected into the flask. What has now happened to the mass, volume and density of the gas mixture in the flask? A) The mass increases, the volume remains constant and the density inreases. B) The mass increases, the volume remains constant and the density decreases. C) The mass remains constant, the volume increases and the density increases. D) The mass remains constant, the volume decreases and the density decreases. E) None of these will happen. Please use the following choices to answer questions 3-8. Each question may have more than one answer. Please choose ALL choices that apply. A) (NH 4 ) 2 SO 4 (s) B) Smoke from a campfire C) 24 kt gold bracelet D) Glass (SiO 2 ) E) H 2 (g) H) Stainless steel I) H 3 PO 4 (aq) J) O 2 dissolved in lake water 3) Please choose all pure substances. 4) Please choose all solutions. 5) Please choose all homogeneous substances. 6) Please choose all substances whose representative particles are identical molecules. 7) Please choose all colloids. 8) Please choose all compounds.

2 9) Which one illustrates physical changes? I) 2 NaCl 2 Na (s) + Cl 2 (g) II) Iron rusts. III) A seed grows into a plant. IV) NaCl (g) NaCl(l) V) NO - 3 dissolves in an aquarium of water. A) II, III, IV B) I, III, III, IV, V C) IV, V D) II, III E) None of these choices are correct. 10) Which one illustrates chemical change(s)? I) 2 H 2 O 2 H 2 (g) + O 2 (g) II) Silver tarnishes. III) Alcohol is distilled from Listerine. IV) A bleach spill leaves a white spot on jeans. V) Chromatography is used to separate the yellow dye from M&Ms. A) I, III, V B) I, II, IV C) I, V D) II, IV E) None of these choices are correct. 11) What is the precision of this instrument? A) ± 0.1 B) ± 0.01 C) ± D) ± ) Which one is true about a 5.00-cm 3 sample of Pb (density = 11.3 g/cm 3 ) and a 5.00-cm 3 sample of Fe (density = 7.87 g/cm 3 )? A) The Fe sample contains more tightly packed atoms than the Pb sample. B) The Pb sample has a greater mass than the Fe sample. C) The samples have equal masses D) The Pb sample would displace more water than the Fe sample. E) The Fe sample has a larger volume than the Pb sample. 13) Which one could not be used to measure 49 ml H 2 O? A) 50-ml volumetric flask B) 50-ml graduated cylinder C) 50-ml buret D) 100-ml graduated cylinder

3 14) Please examine the following lab data. Which one best describes these results? Trial Density of Ag g/ml g/ml g/ml g/ml A) Large relative deviation = good precision B) Small relative deviation = good accuracy C) Large relative error = bad precision D) Small relative error = good accuracy E) None of these are correct. 15) Which one is correct scientific notation for A) X 10 5 B) 3.02 X 10 3 C) X 10-5 D) 3020 X 10-5 E) 3.02 X ) Which one correctly signifies 405,000,000 A) 405 X 10 6 B) 405 X 10 8 C) 4.05 X 10-8 D) X 10 8 E) 4.05 X ) Which one illustrates the number with four significant digits? A) X 10 4 B) X 10 3 C) X 10 6 D) X 10-6 E) X ) Please consider this cube that measures 1 m on each side. How many dm 3 does the cube contain? A) 1 B) 1 X 10 1 C) 1 X 10 2 D) 1 X 10 3 E) 1 X ) Which one is not a fundamental SI unit? A) Volume = liter (L) B) Electric current = ampere (A) C) Mass = kilogram (kg) D) Temperature = kelvin (K) E) Luminous intensity = candela (cd)

4 20) Which one is a true statement? A) 1 X 10-6 μm = 1 m B) 1 X 10-3 m = 1 km C) 1 X 10-9 m = 1 nm D) 1 X 10-6 m = 1 Mm E) 1 X Tm = 1 m 21) Which one is most likely? A) 3 pm = the diameter of an invading alien space ship B) 3 dkm = a football pass C) 3 Gm = the length of the B-hallway D) 3 mm = the distance between protons in a nucleus E) 3 cm = the thickness of a quarter 22) A chemistry student is asked to analyze a transparent, brown liquid. The student observes that the liquid passes through a filter paper with no residue left behind in the filter paper. The student observes that the liquid has no Tyndall effect. When the student gently heats a sample of the liquid, it rapidly evaporates, leaving a brown residue in the test tube. Which one could be the brown liquid? A) Compound, element or solution B) Colloid, compound or element C) Element or compound D) Colloid or compound E) Solution 23) Please convert o C to Kelvin. A) 248 K B) -248 K C) 298 K D) -298 K 24) Which one would be the best technique for separating alcohol from Listerine? A) Distillation B) Filtration C) Spectroscopy D) Chromatography 25) Which one is true? A) Place chipped or broken glassware in the trash can. B) Hot glass looks different than cold glass. C) Have your lab partner snort a chemical before you do to ensure your own safety. D) Point a test tube toward your lab partner when you are heating a substance. E) Place unused chemicals into an appropriate waste container. 26) Which one is false? A) The crucible is supported by the clay triangle on the ring clamp. B) The buchner funnel is placed on a florence flask. C) The triangular file is used to etch glass tubing in order to break it. D) The condenser tube is used to turn a gas back to a liquid. E) The buret is used to measure exact volumes of liquids used in a procedure.

5 27) If you were able to shrink yourself to a few micrometers tall inside your safe exploratory ship and enter a bubble of gas that forms at the surface of an aquatic plant in an aquarium, what would you observe. A) The gas is room temperature and contains O 2. B) The gas is room temperature and contains H 2 O. C) The gas is at 100 o C and contains O 2. D) The gas is at 100 o C and contains H 2 O. 28) If you were able to shrink yourself to a few micrometers tall inside your safe, exploratory ship and enter a bubble of gas that forms when water begins to boil, what would you observe? A) The gas is 100 o C & contains O 2. B) The gas is 100 o C & contains H 2 O. C) The gas is room temperature & contains H 2 O. D) The gas is room temperature & contains O 2. Please use the following information to answer questions Tank Mass of ammonia added to Algae cell growth in pond water (g) pond water (Number/hour) # # # # ) Which one is true? A) The control group is tank #4. B) The dependent variable is the algae cell growth. C) The experimental group is tank #1. D) The dependent variable is the ammonia. E) A minimum mass of ammonia is necessary for algae cell growth. 30) Please write a valid conclusion for this experiment.

6 Problems (42%) 1) What is the thickness of this piece of gold foil? PLEASE SHOW ALL YOUR WORK FOR ANY CREDIT. Density 19.2 g/cm 3 Mass g Length 1.08 cm Width 2.14 cm 2) ) How many atoms of carbon are in g Fe 2 (C 2 O 4 ) 3? Please use dimensional analysis and show all your work for any credit. 4) How many miles 3 are in Gm 3? Please use dimensional analysis and show all your work for any credit. 1 ft = 12 in. 1 in = 2.54 cm. 1 mile = 5280 ft. 5) Please convert GL/week to nl/minute. Please use dimensional analysis and show all your work for any credit. 6) The price of gold is $ /dkg. The density of gold is 19.2 g/ml. How much money you spend to purchase X fl of gold? Please use dimensional analysis and show all your work for any credit. 7) An g sample of a solid is placed in a graduated cylinder containing benzene. The total volume is ml when the sample is added to the cylinder. The solid and the benzene together weigh g. The density of the benzene is g/ml. What is the density of the solid? Please show all your work for any credit.

7 AP Chemistry Test (Chapter 1) Football Name Please Use the Answer Sheet PLEASE DO NOT WRITE ON THIS TEST! THANK YOU!! Multiple Choice (60%) 1) Which one is true? A) Place chipped or broken glassware in the trash can. B) Hot glass looks different than cold glass. C) Have your lab partner snort a chemical before you do to ensure your own safety. D) Point a test tube toward your lab partner when you are heating a substance. E) Place unused chemicals into an appropriate waste container. 2) Which one is false? A) The crucible is supported by the clay triangle on the ring clamp. B) The buchner funnel is placed on a florence flask. C) The triangular file is used to etch glass tubing in order to break it. D) The condenser tube is used to turn a gas back to a liquid. E) The buret is used to measure exact volumes of liquids used in a procedure. 3) Which one illustrates physical changes? I) 2 NaCl 2 Na (s) + Cl 2 (g) II) Iron rusts. III) A seed grows into a plant. IV) NaCl (g) NaCl(l) V) NO - 3 dissolves in an aquarium of water. A) II, III, IV B) I, III, III, IV, V C) IV, V D) II, III E) None of these choices are correct. 4) Which one illustrates chemical change(s)? I) 2 H 2 O 2 H 2 (g) + O 2 (g) II) Silver tarnishes. III) Alcohol is distilled from Listerine. IV) A bleach spill leaves a white spot on jeans. V) Chromatography is used to separate the yellow dye from M&Ms. A) I, III, V B) I, II, IV C) I, V D) II, IV E) None of these choices are correct. 5) Which one is correct scientific notation for A) X 10 5 B) 3.02 X 10 3 C) X 10-5 D) 3020 X 10-5 E) 3.02 X 10-5

8 6) Which one correctly signifies 405,000,000 A) 405 X 10 6 B) 405 X 10 8 C) 4.05 X 10-8 D) X 10 8 E) 4.05 X ) Which one illustrates the number with four significant digits? A) X 10 4 B) X 10 3 C) X 10 6 D) X 10-6 E) X ) Please consider this cube that measures 1 m on each side. How many dm 3 does the cube contain? A) 1 B) 1 X 10 1 C) 1 X 10 2 D) 1 X 10 3 E) 1 X ) If you were able to shrink yourself to a few micrometers tall inside your safe exploratory ship and enter a bubble of gas that forms at the surface of an aquatic plant in an aquarium, what would you observe. A) The gas is room temperature and contains O 2. B) The gas is room temperature and contains H 2 O. C) The gas is at 100 o C and contains O 2. D) The gas is at 100 o C and contains H 2 O. 10) If you were able to shrink yourself to a few micrometers tall inside your safe, exploratory ship and enter a bubble of gas that forms when water begins to boil, what would you observe? A) The gas is 100 o C & contains O 2. B) The gas is 100 o C & contains H 2 O. C) The gas is room temperature & contains H 2 O. D) The gas is room temperature & contains O 2. 11) Which one is not a fundamental SI unit? A) Volume = liter (L) B) Electric current = ampere (A) C) Mass = kilogram (kg) D) Temperature = kelvin (K) E) Luminous intensity = candela (cd) 12) Which one is a true statement? A) 1 X 10-6 μm = 1 m B) 1 X 10-3 m = 1 km C) 1 X 10-9 m = 1 nm D) 1 X 10-6 m = 1 Mm E) 1 X Tm = 1 m

9 13) Which one is most likely? A) 3 pm = the diameter of an invading alien space ship B) 3 dkm = a football pass C) 3 Gm = the length of the B-hallway D) 3 mm = the distance between protons in a nucleus E) 3 cm = the thickness of a quarter 14) What is the precision of this instrument? A) ± 0.1 B) ± 0.01 C) ± D) ± ) Which one is true about a 5.00-cm 3 sample of Pb (density = 11.3 g/cm 3 ) and a 5.00-cm 3 sample of Fe (density = 7.87 g/cm 3 )? A) The Fe sample contains more tightly packed atoms than the Pb sample. B) The Pb sample has a greater mass than the Fe sample. C) The samples have equal masses D) The Pb sample would displace more water than the Fe sample. E) The Fe sample has a larger volume than the Pb sample. 16) Which one could not be used to measure 49 ml H 2 O? A) 50-ml volumetric flask B) 50-ml graduated cylinder C) 50-ml buret D) 100-ml graduated cylinder 17) Please examine the following lab data. Which one best describes these results? Trial Density of Ag g/ml g/ml g/ml g/ml A) Large relative deviation = good precision B) Small relative deviation = good accuracy C) Large relative error = bad precision D) Small relative error = good accuracy E) None of these are correct. 18) Please convert o C to Kelvin. A) 248 K B) -248 K C) 298 K D) -298 K

10 19) A chemistry student is asked to analyze a transparent, brown liquid. The student observes that the liquid passes through a filter paper with no residue left behind in the filter paper. The student observes that the liquid has no Tyndall effect. When the student gently heats a sample of the liquid, it rapidly evaporates, leaving a brown residue in the test tube. Which one could be the brown liquid? A) Compound, element or solution B) Colloid, compound or element C) Element or compound D) Colloid or compound E) Solution 20) Which one would be the best technique for separating alcohol from Listerine? A) Distillation B) Filtration C) Spectroscopy D) Chromatography Please use the following choices to answer questions Each question may have more than one answer. Please choose ALL choices that apply. A) Smoke from a campfire B) (NH 4 ) 2 SO 4 (s) C) H 3 PO 4 (aq) D) Stainless steel E) O 2 dissolved in lake water H) Glass (SiO 2 ) I) 24 kt gold bracelet J) H 2 (g) 21) Please choose all homogeneous substances. 22) Please choose all compounds. 23) Please choose all pure substances. 24) Please choose all substances whose representative particles are identical molecules. 25) Please choose all solutions. 26) Please choose all colloids. 27) A balloon is filled with air and then tied off (sealed). It is placed in ice water. Which one will occur? A) The mass remains constant, the volume increases and the density decreases. B) The mass remains constant, the volume decreases and the density increases. C) The mass increases, the volume decreases and the density increases. D) The mass remains constant, the volume decreases the density remains constant. E) None of these will occur.

11 28) A 6-L Erlenmeyer flask originally contains g air. 2 ml of O 2 is injected into the flask. What has now happened to the mass, volume and density of the gas mixture in the flask? A) The mass increases, the volume remains constant and the density inreases. B) The mass increases, the volume remains constant and the density decreases. C) The mass remains constant, the volume increases and the density increases. D) The mass remains constant, the volume decreases and the density decreases. E) None of these will happen. Please use the following information to answer questions Tank Mass of ammonia added to Algae cell growth in pond water (g) pond water (Number/hour) # # # # ) Which one is true? A) The control group is tank #4. B) The dependent variable is the ammonia. C) The experimental group is tank #1. D) The dependent variable is the algae cell growth. E) A minimum mass of ammonia is necessary for algae cell growth. 30) Please write a valid conclusion for this experiment.

12 Problems (42%) 1) What is the thickness of this piece of gold foil? PLEASE SHOW ALL YOUR WORK FOR ANY CREDIT. Density 19.2 g/cm 3 Mass g Length 1.02 cm Width 2.11 cm 2) ) How many atoms of oxygen are in g Fe 2 (C 2 O 4 ) 3? Please use dimensional analysis and show all your work for any credit. 4) How many miles 3 are in Tm 3? Please use dimensional analysis and show all your work for any credit. 1 ft = 12 in. 1 in = 2.54 cm. 1 mile = 5280 ft. 5) Please convert ML/week to pl/minute. Please use dimensional analysis and show all your work for any credit. 6) The price of gold is $ /hg. The density of gold is 19.2 g/ml. How much money you spend to purchase X nl of gold? Please use dimensional analysis and show all your work for any credit. 7) An g sample of a solid is placed in a graduated cylinder containing benzene. The total volume is ml when the sample is added to the cylinder. The solid and the benzene together weigh g. The density of the benzene is g/ml. What is the density of the solid? Please show all your work for any credit.