Regents Chemistry Test Preparation Practice

    Regents Test, Full Exam Practice Online: chemistry June 2016

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    Base your answers to questions 52 and 53 on the information below and on your knowledge of chemistry.

    At STP, Cl2 is a gas and I2 is a solid. When hydrogen reacts with chlorine, the compound hydrogen chloride is formed. When hydrogen reacts with iodine, the compound hydrogen iodide is formed.

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    Base your answers to questions 54 and 55 on the information below and on your knowledge of chemistry.

    Some properties of the element sodium are listed below.

    • is a soft, silver-colored metal
    • melts at a temperature of 371 K
    • oxidizes easily in the presence of air
    • forms compounds with nonmetallic elements in nature
    • forms sodium chloride in the presence of chlorine gas
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    Base your answers to questions 56 through 58 on the information below and on your knowledge of chemistry.

    At standard pressure, water has unusual properties that are due to both its molecular structure and intermolecular forces. For example, although most liquids contract when they freeze, water expands, making ice less dense than liquid water. Water has a much higher boiling point than most other molecular compounds having a similar gram-formula mass.

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    Base your answers to questions 59 and 60 on the information below and on your knowledge of chemistry.

    At 1023 K and 1 atm, a 3.00-gram sample of SnO2(s) (gram-formula mass = 151 g/mol) reacts with hydrogen gas to produce tin and water, as shown in the balanced equation below.

    SnO2(s) + 2H2(g) → Sn(ℓ) + 2H2O(g)

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    Base your answers to questions 61 and 62 on the information below and on your knowledge of chemistry.

    The incomplete data table below shows the pH value of solutions A and B and the hydrogen ion concentration of solution A.

    acidity-ph-and-indicators fig: chem62016-exam_g11.png

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    Base your answers to questions 63 through 65 on the information below and on your knowledge of chemistry.

    A sample of helium gas is placed in a rigid cylinder that has a movable piston. The volume of the gas is varied by moving the piston, while the temperature is held constant at 273 K. The volumes and corresponding pressures for three trials are measured and recorded in the data table below. For each of these trials, the product of pressure and volume is also calculated and recorded. For a fourth trial, only the volume is recorded.

    gas-lows fig: chem62016-exam_g12.png

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    Base your answers to questions 66 through 69 on the information below and on your knowledge of chemistry.

    Potassium phosphate, K3PO4, is a source of dietary potassium found in a popular cereal. According to the Nutrition-Facts label shown on the boxes of this brand of cereal, the accepted value for a one-cup serving of this cereal is 170. milligrams of potassium. The minimum daily requirement of potassium is 3500 milligrams for an adult human.

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    Base your answers to questions 70 and 71 on the information below and on your knowledge of chemistry.

    During photosynthesis, plants use carbon dioxide, water, and light energy to produce glucose, C6H12O6, and oxygen. The reaction for photosynthesis is represented by the balanced equation below.

    6CO2 + 6H2O + light energy → C6H12O6 + 6O2

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    Base your answers to questions 72 through 74 on the information below and on your knowledge of chemistry.

    Fireworks that contain metallic salts such as sodium, strontium, and barium can generate bright colors. A technician investigates what colors are produced by the metallic salts by performing flame tests. During a flame test, a metallic salt is heated in the flame of a gas burner. Each metallic salt emits a characteristic colored light in the flame.

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    Base your answers to questions 75 through 77 on the information below and on your knowledge of chemistry.

    The unique odors and flavors of many fruits are primarily due to small quantities of a certain class of organic compounds. The equation below represents the production of one of these compounds.

    formula-mass-and-gram-formula-mass fig: chem62016-exam_g13.png

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    Base your answers to questions 78 through 81 on the information below and on your knowledge of chemistry.

    A student develops the list shown below that includes laboratory equipment and materials for constructing a voltaic cell.

    voltaic-cell fig: chem62016-exam_g14.png

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    Base your answers to questions 82 through 85 on the information below and on your knowledge of chemistry.

    In 1896, Antoine H. Becquerel discovered that a uranium compound could expose a photographic plate wrapped in heavy paper in the absence of light. It was shown that the uranium compound was spontaneously releasing particles and high-energy radiation. Further tests showed the emissions from the uranium that exposed the photographic plate were not deflected by charged plates.

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