Regents Chemistry Test Preparation Practice

    Regents Test, Full Exam Practice Online: chemistry January 2017

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53

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

    The densities for two forms of carbon at room temperature are listed in the table below.

    identification-of-element fig: chem12017-exam_g14.png

    54
    55

    Base your answers to questions 56 and 57 on the information below and on your knowledge of chemistry.

    A sample of calcium carbonate, CaCO3, has a mass of 42.2 grams. Calcium carbonate has a gram-formula mass of 100. g/mol.

    56
    57

    Base your answers to questions 58 and 59 on the information below and on your knowledge of chemistry.

    Carbon monoxide, CO(g), is a toxic gas found in automobile exhaust. The concentration of CO(g) can be decreased by using a catalyst in the reaction between CO(g) and O2(g). This reaction is represented by the balanced equation below.

    collision-theory-and-the-rate-of-reaction fig: chem12017-exam_g16.png

    58
    59

    Base your answers to questions 60 and 61 on the information below and on your knowledge of chemistry.

    The diagram and data below represent a gas and the conditions of pressure, volume, and temperature of the gas in a rigid cylinder with a moveable piston.

    gas-lows fig: chem12017-exam_g15.png

    60
    61

    Base your answers to questions 62 through 65 on the information below and on your knowledge of chemistry.

    During a titration, 10.00 mL of acetic acid, HC2H3O2(aq), is completely neutralized by adding 12.50 mL of 0.64 M sodium hydroxide, NaOH(aq).

    62
    63
    64
    65

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

    Carbon dioxide, CO2, changes from the solid phase to the gas phase at 1 atm and 194.5 K. In the solid phase, CO2 is often called dry ice. When dry ice sublimes in air at 298 K, the water vapor in the air can condense, forming a fog of small water droplets. This fog is often used for special effects at concerts and in movie-making.

    66
    67
    68

    Base your answers to questions 69 through 72 on the information below and on your knowledge of chemistry.

    A solution of ethylene glycol and water can be used as the coolant in an engine-cooling system. The ethylene glycol concentration in a coolant solution is often given as percent by volume. For example, 100. mL of a coolant solution that is 40.% ethylene glycol by volume contains 40. mL of ethylene glycol diluted with enough water to produce a total volume of 100. mL. The graph below shows the freezing point of coolants that have different ethylene glycol concentrations.

    classification-of-matter fig: chem12017-exam_g17.png

    69
    70
    71
    72

    Base your answers to questions 73 through 77 on the information below and on your knowledge of chemistry.

    Molecules containing two carbon atoms and a functional group have many home and industrial uses. These compounds can be produced by a variety of reactions, as shown by the equations below.

    Equation 1: C2H4 + H2O → CH3CH2OH

    Equation 2: 2CH3CH2OH + O2 → 2CH3CHO + 2H2O

    Equation 3: 2CH3CHO + O2 → 2CH3COOH

    73
    74
    75
    76
    77

    Base your answers to questions 78 and 79 on the information below and on your knowledge of chemistry.

    The hydrangea is a flowering plant. The color of the flowers it produces can change depending on the pH value of the soil in which the plant grows. Adding aluminum sulfate makes the soil more acidic and adding calcium hydroxide makes the soil more basic.

    A student performed an experiment by varying soil pH and recording the color of the flowers. The following table summarizes the results of the experiment.

    significent-figures-conversions fig: chem12017-exam_g18.png

    78
    79

    Base your answers to questions 80 through 82 on the information below and on your knowledge of chemistry.

    The diagram and balanced ionic equation below represent two half-cells connected to produce an operating voltaic cell in a laboratory investigation. The half-cells are connected by a salt bridge.

    oxidation-numbers-(states) fig: chem12017-exam_g19.png

    80
    81
    82

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

    The radioisotope Mo-99 naturally decays to produce the metastable isotope Tc-99m, which is used in medical diagnosis. A doctor can obtain images of organs and bones by injecting a patient with a solution of Tc-99m. The half-life of the metastable Tc-99m is six hours.

    83
    84
    85