Regents Chemistry Test Preparation Practice

    Regents Test, Full Exam Practice Online: chemistry June 2017

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    Base your answers to questions 51 through 53 on the information below and on your knowledge of chemistry.

    The elements in Group 17 are called halogens. The word “halogen” is derived from Greek and means “salt former.”

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    Base your answers to questions 54 through 57 on the information below and on your knowledge of chemistry.

    The diagrams below represent four different atomic nuclei.

    identification-of-element fig: chem62017-exam_g21.png

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    Base your answers to questions 58 through 60 on the information below and on your knowledge of chemistry.

    The equation below represents a chemical reaction at 1 atm and 298 K.

    2H2(g) + O2(g) → 2H2O(g)

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    Base your answers to questions 61 through 63 on the information below and on your knowledge of chemistry.

    • A test tube contains a sample of solid stearic acid, an organic acid.
    • Both the sample and the test tube have a temperature of 22.0°C.
    • The stearic acid melts after the test tube is placed in a beaker with

      320. grams of water at 98.0°C.

    • The temperature of the liquid stearic acid and water in the beaker reaches 74.0°C.
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    Base your answers to questions 64 and 65 on the information below and on your knowledge of chemistry.

    A nuclear reaction is represented by the equation below.

    31H → 32He + 0−1e

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    Base your answers to questions 66 through 68 on the information below and on your knowledge of chemistry.

    A technician recorded data for two properties of Period 3 elements. The data are shown in the table below.

    elements-in-the-periodic-table fig: chem62017-exam_g22.png

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    Base your answers to questions 69 through 71 on the information below and on your knowledge of chemistry.

    Ammonia, NH3(g), can be used as a substitute for fossil fuels in some internal combustion engines. The reaction between ammonia and oxygen in an engine is represented by the unbalanced equation below.

    NH3(g) + O2(g) → N2(g) + H2O(g) + energy

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    Base your answers to questions 72 through 76 on the information below and on your knowledge of chemistry.

    Fruit growers in Florida protect oranges when the temperature is near freezing by spraying water on them. It is the freezing of the water that protects the oranges from frost damage. When H2O(ℓ) at 0°C changes to H2O(s) at 0°C, heat energy is released. This energy helps to prevent the temperature inside the orange from dropping below freezing, which could damage the fruit. After harvesting, oranges can be exposed to ethene gas, C2H4, to improve their color.

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    Base your answers to questions 77 through 80 on the information below and on your knowledge of chemistry.

    A student constructs an electrochemical cell during a laboratory investigation. When the switch is closed, electrons flow through the external circuit. The diagram and ionic equation below represent this cell and the reaction that occurs.

    voltaic-cell fig: chem62017-exam_g23.png

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    Base your answers to questions 81 and 82 on the information below and on your knowledge of chemistry.

    A solution is made by dissolving 70.0 grams of KNO3(s) in 100. grams of water at 50.°C and standard pressure.

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    Base your answers to questions 83 through 85 on the information below and on your knowledge of chemistry.

    Vinegar is a commercial form of acetic acid, HC2H3O2(aq). One sample of vinegar has a pH value of 2.4.

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