16. What causes a bottle of soda to burst when placed in a freezer overnight? A) The water in the soda contracts when it freezes. B) The water in the soda expands when it freezes. C) The bottle contracts when it freezes. D) The bottle expands when it freezes. 17. Which process is the best way to remove the color and odor from water? A) Filter the water sample through sand and gravel. B) Add charcoal and filter the water Sample using a funnel and filter paper. C) Distill the water sample using a condenser and flask. D) Add a test solution to the water such as Na2CO3 18. Which comparison is correct concerning the percent of water used across the ? A) The east uses a greater percentage For irrigation than the midwest B) More water is used for electric than for agriculture in the whole (Nation) C) The South, East and the all use more water for Steam/electric than any other purpose. D) and both use no water for mining Purposes. 19. In the above picture our dog "Lucky" is getting a bath. Which of the following statements is true regarding how water is used in the picture A) It is an indirect use, but something we could do without given a water shortage. B) It is an indirect use of water, but a necessary use of daily water. C) It is a direct use of water and not necessary in a water shortage situation D) It is a direct use of water and should be done everyday regardless of the water supply on hand 20. The mayor must decide the amount of water to have sent to Riverwood during the three day water shortage. Which of the following factors should not be included? A) The number of lawns needing water B) The population of the town C) The amount of drinking water needed each day per person D) The amount of water needed for personal hygiene for the 3 days (washing face, teeth, etc.) 21. Which symbol does not represent an ion? A) Na B) Ca+ C) Cl– D) H+
28. Which two terms for types of matter both identify substances? A) elements and compounds B) compounds and solutions C) mixtures and compounds D) nonmetals and mixtures 29. When particles with the same charge move closer to each other, the particles will A) attract B) repel C) bond D) combine ___ 1. Pennies made after the year 1982 have the highest content of which element? A) zinc B) copper C) lead D) aluminum E) iron ___ 2. By using results from tests like the “Metal Reactivities” lab, the metal elements can be ranked in order of their chemical reactivity. This ranking is called the A) data table B) periodic table C) density series D) activity series ___ 3. Which equation correctly represents the oxidation of calcium to calcium ion? A) Ca2+ + 2e– → Ca B) 2Ca2+ + 2e– → Ca4+ C) Ca → 2Ca+ + 2e– D) Ca → Ca2+ + 2e– ___ 4. Which person developed the periodic table based on the properties of the elements? A) John Dalton B) Dimitri Mendeleev C) Fritz Haber D) Niels Bohr ___ 5. What is the total number of molecules in one mole of nitrogen, N2? A) 6.02  1023 B) 1.50  1022 C) 1.20  1024 D) 3.01  1023 ___ 6. The chemical formula for baking soda is NaHCO3. The subscript “3” in this formula means three A) molecules of baking soda B) atoms of oxygen C) atoms of carbon D) molecules of carbon dioxide
___ 24. Properties such as melting point, density, and electrical conductivity are examples of A) nuclear properties B) physical properties C) chemical properties ___ 25. Which of these is an example of an alloy? A) nylon B) wood C) glass D) brass ___ 26. How many moles of sulfur are present in a 16-g sample of sulfur? A) 0.50 mol B) 2.0 mol C) 32 mol D) 0.25 mol ___ 27. When an ion of copper in the ore chalcocite gains electrons, the Cu2+ ion is A) fused B) reduced C) ionized D) oxidized ___ 28. A metal is usually obtained from its ore by a process called A) casting B) oxidation C) reduction D) melting ___ 29. Which of these elements is most similar chemically to phosphorus? A) N B) Si C) S D) C ___ 30. Horizontal rows of elements in the periodic table are called A) periods B) octaves C) triads D) families ___ 31. Given the balanced equation for the reaction producing ammonia: N2 + 3H2  2NH3 How many moles of N2 are needed to Produce 6 moles of NH3? 2 3 6 9 ___ 32. How many moles of hydrogen atoms are in 4 moles of H2O? A) 12 B) 4 C) 8 D) 2
15. Heavy metal ions bind to ___________ and affect the _____, _____, _____ systems. A) carbohydrates; reproductive, nervous, and muscle B) DNA; reproductive, liver, and kidney C) proteins; respiratory, digestive, and reproductive D) proteins; kidney, liver, and nervous 16. A pond is contaminated with a chemical that is a base. Which ion will be present in higher concentration than in uncontaminated water? A) SO42– B) Ba2+ C) H+ D) OH– Use the graph in #19 for #17. 17. If 8 milligrams of oxygen is dissolved in 1000 grams of water at 12°C, the solution is A) Unsaturated B) Supersaturated C) Saturated 18. Vinegar contains a water solution of acetic acid. The most likely pH of vinegar is A) 7 B) 3 C) 13 D) –1 19. Water at 30°C is saturated with oxygen. The temperature of the water is cooled to 5°C. How much more oxygen must be dissolved in 1000 grams of water to keep it saturated? A) 20 mg B) 12 mg C) 6 mg D) 1 mg 20. Water dissolves ionic compounds very well. Which statement best describes how this happens? A) The (-) oxygen end of water is attracted to the cation while the (+) hydrogen end is attracted to the anion. B) Nonpolar bonds are made between water and ionic compounds. C) The nonpolar ends of water attract the polar ionic compounds. D) Ionic compounds break water molecules into hydrogen and hydroxide. 21. A solution that contains more solute than the indicated on the solubility graph for a certain temperature is A) diluted B) saturated C) unsaturated D) supersaturated