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    Chemistry worksheet
    Topic: Differentiation Of Types Of Substances

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    Differentiation Of Types Of Substances
    1

    Chemical properties can be used to

    (1) determine the temperature of a substance

    (2) determine the density of a substance

    (3) differentiate between two compounds

    (4) differentiate between two neutrons

    2

    Compared to the physical and chemical proper- ties of the compound NO2, the compound N2O has

    (1) different physical properties and different chemical properties

    (2) different physical properties and the same chemical properties

    (3) the same physical properties and different chemical properties

    (4) the same physical properties and the same chemical properties

    3

    Carbon monoxide and carbon dioxide have

    (1) the same chemical properties and the same physical properties

    (2) the same chemical properties and different physical properties

    (3) different chemical properties and the same physical properties

    (4) different chemical properties and different physical properties

    4

    Which statement describes H2O(ℓ) and H2O2(ℓ)?

    (1) Both are compounds that have the same properties.

    (2) Both are compounds that have different properties.

    (3) Both are mixtures that have the same properties.

    (4) Both are mixtures that have different properties.

    5

    A sample of a substance has these characteristics: (cid:129) melting point of 984 K (cid:129) hard, brittle solid at room temperature (cid:129) poor conductor of heat and electricity as a solid (cid:129) good conductor of electricity as a liquid or in

    an aqueous solution

    This sample is classified as

    (1) a metallic element

    (2) a radioactive element

    (3) a molecular compound

    (4) an ionic compound

    6

    Which formulas represent one ionic compound and one molecular compound?

    (1) N2 and SO2

    (2) Cl2 and H2S

    (3) BaCl2 and N2O4

    (4) NaOH and BaSO4

    7

    Compared to the chemical and physical properties of the compound CO, the compound CO2 has

    (1) the same chemical properties and the same physical properties

    (2) the same chemical properties and different physical properties

    (3) different chemical properties and the same physical properties

    (4) different chemical properties and different physical properties

    8

    A 2.5 L sample of SO2(g) at STP and a 2.5 L sample of CO2(g) at STP can be differentiated by comparing their

    (1) masses

    (2) phases

    (3) temperatures

    (4) volumes

    9

    Which property can be used to differentiate between a 50.-gram sample of solid potassium nitrate at STP and a 50.-gram sample of solid silver chloride at STP?

    mL

    (1) mass

    (2) temperature

    (3) phase

    (4) solubility

    10

    Ice, H2O(s), is classified as

    (1) an ionic compound

    (2) a molecular compound

    (3) a homogeneous mixture

    (4) a heterogeneous mixture

    11

    Which elements can react to produce a molecular compound?

    (1) calcium and chlorine

    (2) hydrogen and sulfur

    (3) lithium and fluorine

    (4) magnesium and oxygen

    12

    A solid sample of a compound and a liquid sample of the same compound are each tested for electrical conductivity. Which test conclusion indicates that the compound is ionic?

    (1) Both the solid and the liquid are good conductors.

    (2) Both the solid and the liquid are poor conductors.

    (3) The solid is a good conductor, and the liquid is a poor conductor.

    (4) The solid is a poor conductor, and the liquid is a good conductor.

    Base your answers to questions 13 on the information below and on your knowledge of chemistry.

    A laboratory technician is given the table below and a sample of one of the three substances listed in the table. The technician makes an aqueous solution with a portion of the sample. When a conductivity tester is lowered into the solution, the lightbulb on the tester glows brightly. Another portion of the sample is placed in a heat-resistant container that is placed in an oven at 450.°C. The sample melts.

    chemical-bonding, differentiation-of-types-of-substances fig: chem12016-exam_g9.png

    13

    Identify the substance given to the technician.

    Allow 1 credit. Acceptable responses include, but are not limited to:

    • sodium nitrate

    • NaNO3

    Base your answers to questions 14 on the information below and on your knowledge of chemistry.

    Some compounds of silver are listed with their chemical formulas in the table below.

    periodic-table, elements-in-the-periodic-table, chemical-bonding, bonding-tendency-of-elements, chemical-bonding, differentiation-of-types-of-substances fig: chem62018-exam_g21.png

    14

    Explain, in terms of element classification, why silver chloride is an ionic compound.

    Allow 1 credit. Acceptable responses include, but are not limited to:

    • The reaction between a metal and a nonmetal can produce an ionic compound.

    • Silver is a metal and chlorine is a nonmetal.

    15

    A student drew the Lewis electron-dot diagram below to represent sodium chloride.

    chemical-bonding, electron-dot-diagrams-(lewis-structures), atomic-concepts, valence-electrons, chemical-bonding, electron-dot-diagrams-(lewis-structures), chemical-bonding, bonding-tendency-of-elements, chemical-bonding, chemical-bonds, chemical-bonding, differentiation-of-types-of-substances fig: chem82015-exam_g6.png

    Explain why this diagram is not an accurate representation for the bonding in NaCl.

    Allow 1 credit. Acceptable responses include, but are not limited to:

    • Ion charges are not shown.

    • No electron transfer is shown in the diagram.

    • The student’s diagram represents a molecular compound.