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Homework answers / question archive / Chapter 1: Matter and Energy 1) Which of the following is not an example of matter?             A)      a rock                                                     D)      steam             B)      a hot-air balloon                                    E)      heat from a barbeque grill             C)      carbon dioxide in your exhaled breath                     2

Chapter 1: Matter and Energy 1) Which of the following is not an example of matter?             A)      a rock                                                     D)      steam             B)      a hot-air balloon                                    E)      heat from a barbeque grill             C)      carbon dioxide in your exhaled breath                     2

Chemistry

Chapter 1: Matter and Energy

1) Which of the following is not an example of matter?

            A)      a rock                                                     D)      steam

            B)      a hot-air balloon                                    E)      heat from a barbeque grill

            C)      carbon dioxide in your exhaled breath          

 

        2.  Which of the following is not an example of matter?

            A)      air                                                          D)      the propellant in an aerosol can

            B)      light from a candle                                E)      a stain on clothing

            C)      wax                                                                

 

        3.  Which of the following is an example of matter?

            A)      sunlight                                                  D)      heat from a car's radiator

            B)      light from an incandescent bulb            E)      all of these are correct

            C)      helium in a balloon                                         

 

        4.  Which of the following does not apply to a chemical compound?

            A)      A chemical compound consists of two or more elements.

            B)      The elements in a compound are combined in definite proportions.

            C)      The characteristics of the compound are different from the characteristics of the elements from which it is made.

            D)      Compounds can be separated into their constituent elements using only physical methods.

            E)      A chemical compound can also be classified as a pure substance.

 

        5.  Which of the following statements regarding elements is incorrect?

            A)      Elements are the simplest building block of matter.

            B)      Elements cannot be broken down into simpler substances even by chemical means.

            C)      Some elements are not naturally occurring, and have been synthesized by scientists.

            D)      As the Greeks had thought, water is an element.

            E)      Elements are classified using a periodic table.

 

        6.  A combination of two or more substances that can be separated by using only a physical process is:

            A)      an element.                                            D)      a substance.

            B)      a compound.                                          E)      a composition.

            C)      a mixture.                                                       

 

        7.  Which of the following is an example of a pure substance?

            A)      sand

            B)      tap water

            C)      aluminum in a soda can (not considering the paint or plastic coatings)

            D)      river water

            E)      granite

        8.  Which of the following is an example of a pure substance?

            A)  a copper wire    B)  milk    C)  leather    D)  a piece of carpet    E)  ocean water

 

        9.  Which of the following is not an example of a mixture?

            A)  air    B)  iced tea    C)  24-carat gold    D)  brass    E)  a person

 

      10.  Which image(s) in the figure represents a pure elemental substance?

            A)  image A    B)  image B    C)  image C    D)  images A and B    E)  image E

 

      11.  Which image(s) in the figure represents a mixture of compounds?

            A)  image A    B)  images A and E    C)  image C    D)  image D    E)  image E

 

      12.  Which image(s) in the figure represents a mixture of two elements?

            A)  image A    B)  image B    C)  image C    D)  image D    E)  images C and D

 

      13.  Which image(s) in the figure represents a mixture?

            A)      image C                                                 D)      images C and D

            B)      image D                                                 E)      images C, D, and E

            C)      image E                                                          

 

      14.  Which of these substances is an element?

            A)  C    B)  CO    C)  N2    D)  HCl    E)  both C and N2

 

      15.  Which of these substances is a compound?

            A)  Co    B)  NI3    C)  Fe    D)  CCl4    E)  both NI3 and CCl4

 

      16.  Select the substance below which is a compound:

            A)  NO    B)  Ir    C)  Ni    D)  Co    E)  Rf

 

      17.  Which of these elements is a metal?

            A)  Ca    B)  N    C)  Ne    D)  C    E)  O

 

      18.  Which of these elements is a nonmetal?

            A)  Na    B)  Mg    C)  Cu    D)  K    E)  Cl

 

      19.  The symbol for the element barium is _________.

            A)  B    B)  Br    C)  Ba    D)  Be    E)  Bi

 

      20.  The symbol for the element copper is __________.

            A)  Co    B)  C    C)  Cr    D)  Cu    E)  Ca

 

      21.  The symbol for the element potassium is__________.

            A)  P    B)  Pt    C)  K    D)  Po    E)  Pa

 

      22.  The symbol for the element sodium is__________.

            A)  S    B)  So    C)  Sm    D)  Na    E)  Sn

 

      23.  The symbol for the element calcium is__________.

            A)  Ca    B)  C    C)  Cm    D)  Cu    E)  Cl

 

      24.  The symbol for the element iron is__________.

            A)  I    B)  Ir    C)  Fe    D)  In    E)  Ag

 

      25.  The symbol Hg corresponds to which element?

            A)  magnesium    B)  gallium    C)  mercury    D)  hydrogen    E)  helium

 

      26.  The symbol Au corresponds to which element?

            A)  arsenic    B)  gold    C)  mercury    D)  silver    E)  aluminum

 

      27.  The physical state of matter which does not have a characteristic shape, but takes on the shape of the filled part of its container, is:

            A)  solid.    B)  liquid.    C)  gas.    D)  liquid or gas.    E)  solid or liquid.

 

      28.  Which physical state is represented in this image?

           

 

            A)  gas    B)  liquid    C)  solid    D)  mixture

 

      29.  Which physical state is represented in this image?

            A)  mixture    B)  gas    C)  liquid    D)  solid

 

      30.  Which of the following statements regarding the solid state of matter is incorrect?

            A)      The symbol for solid is (s).

            B)      Solids consist of particles that do not move past one another.

            C)      The particles in a solid are in close contact with one another.

            D)      Solids can be compressed to smaller volumes.

            E)      When a solid is heated, the particles begin to move faster.

 

      31.  Which of the following statements regarding the gaseous state of matter is incorrect?

            A)      The symbol for a gas is (g).

            B)      Gases consist of particles that are in constant random motion.

            C)      Gases can be compressed to smaller volumes.

            D)      It is possible for gases to mix together.

            E)      The particles in a gas are relatively close to one another.

      32.  A characteristic of a substance that involves the transformations the substance can undergo to produce a different substance is:

            A)      a physical property.                               D)      a material property.

            B)      a chemical property.                              E)      a characteristic property.

            C)      a physical change.                                          

 

      33.  Which of the following statements is incorrect?

            A)      The condensation of steam on a mirror is an example of a physical change.

            B)      The burning of a piece of charcoal to a white powder is an example of a physical change.

            C)      Evaporation of water from a fish tank is evidence of a physical change.

            D)      The fact that sulfur is a yellow powder is a physical property.

            E)      The fact that copper conducts electricity is a physical property.

 

      34.  Which of the following statements is incorrect?

            A)      The burning of propane in a barbecue grill is a physical change.

            B)      The cooking of the meat on a barbecue grill is a chemical change.

            C)      Cleaning the grill afterwards using a steel brush is a physical change.

            D)      Further cleaning of the grill using a detergent is a chemical change.

            E)      Digestion of the meat by your body involves both physical and chemical changes.

 

      35.  Consider the following transformation.  Which of the statements best describes the process?

            A)      A chemical change occurs in which atoms rearrange to form a new compound.

            B)      A chemical change occurs in which an ionic compound is formed from diatomic elements.

            C)      A chemical change occurs in which no atoms rearrange to form a new substance.

            D)      A physical change occurs in which no atoms rearrange to form a new substance.

            E)      A physical change occurs in which atoms rearrange to form a new compound.

 

      36.  Consider the following transformation.  Which of the statements best describes the process?

          

            A)      A physical change occurs in which no atoms rearrange.

            B)      A physical change occurs in which atoms rearrange to form a new compound.

            C)      A chemical change occurs in which no atoms rearrange.

            D)      A chemical change occurs in which atoms rearrange to form a new compound.

            E)      A chemical change occurs in which an ionic compound is formed from diatomic elements.

 

      37.  A 1-ounce serving of Cheetos has 2.90´102 mg of sodium.  What is this mass in units of grams?

            A)  290,000 g    B)  0.290 g    C)  0.00345 g    D)  3.45 g    E)  29.0 g

 

      38.  A brownie contains 1.30´102 mg of sodium.  What is this mass in units of grams?

            A)  130,000 g    B)  0.130 g    C)  13.0 g    D)  7.69 g    E)  0.00769 g

 

      39.  A 1-ounce serving of a breakfast cereal contains 1.60´102 mg of potassium.  What is this mass in units of grams?

            A)  0.160 g    B)  160,000 g    C)  6.25 g    D)  0.00625 g    E)  16.0 g

 

      40.  How many pounds of Spaghettios are in a can that contains 418 g?  (1 lb = 453.6 g)

            A)      0.0576 lb                                               D)      1.90 ´ 105 lb

            B)      1.19 ´ 104 lb                                          E)      3.60 ´ 10-2 lb

            C)      0.922 lb                                                          

      41.  How many pounds of miniature candy bars are in a package that contains 197 g?  (1 lb = 453.6 g)

            A)      0.0271 lb                                               D)      8.94 ´ 105 lb

            B)      0.434 lb                                                 E)      1.69 ´ 10-3 lb

            C)      5.59 ´ 103 lb                                                   

 

      42.  A 1-ounce serving of Doritos has 17 g of carbohydrates.  What is this mass in units of ounces?  (16 ounces = 453.6 g)

            A)  2.7 oz    B)  0.037 oz    C)  0.60 oz    D)  480 oz    E)  28 oz

 

      43.  A can of Spaghettios has a mass of 418 g.  What is this mass in units of ounces?  (16 ounces = 453.6 g)

            A)      0.922 oz                                                 D)      1.19 ´ 104 oz

            B)      1.90 ´ 105 oz                                         E)      5.76 ´ 10-2 oz

            C)      14.8 oz                                                           

 

      44.  A package of miniature candy bars has a mass of 197 g.  What is this mass in units of ounces?  (16 ounces = 453.6 g)

            A)      6.95 oz                                                   D)      1.43 ´ 106 oz

            B)      0.434 oz                                                 E)      2.71 ´ 10-2 oz

            C)      8.94 ´ 104 oz                                                  

 

      45.  A can of cashews has a mass of 8.5 ounces.  What is this mass in kg?  (16 ounces = 453.6 g)

            A)  3900 kg    B)  0.24 kg    C)  240 kg    D)  3.9 kg    E)  0.14 kg

 

      46.  A can of soup has a mass of 10.75 ounces.  What is this mass in kg?  (16 ounces = 453.6 g)

            A)      304.8 kg                                                D)      1.481 ´ 10-3 kg

            B)      0.3048 kg                                              E)      4.876 ´ 103 kg

            C)      2.370 ´ 10-2 kg                                               

 

      47.  A loaf of bread has a mass of 24 ounces.  What is this mass in kg?  (16 ounces = 453.6 g)

            A)  0.68 kg    B)  680 kg    C)  5.3 ´ 10-2 kg    D)  0.85 kg    E)  1.7 ´ 105 kg

 

      48.  What is the mass in kilograms of a copper pipe that weighs 12.5 pounds?  (1 lb = 453.6 g)

            A)  0.0276 kg    B)  27.6 kg    C)  5.67 ´ 103 kg    D)  5.67 kg    E)  1.72 ´ 10-3 kg

      49.  A typical light-weight bicycle weighs 17.5 pounds.  What is the mass of a typical bike in kilograms?  (1 lb = 453.6 g)

            A)      0.0386 kg                                              D)      1.27 ´ 105 kg

            B)      7.94 kg                                                  E)      2.41 ´ 10-3 kg

            C)      7.94 ´ 106 kg                                                  

 

      50.  A bottle of Gatorade has a volume of 591 mL.  What is this volume in L?

            A)  5.91 L    B)  591,000 L    C)  0.00169 L    D)  1.69 L    E)  0.591 L

 

      51.  A bottle of soda has a volume of 474 mL.  What is this volume in L?

            A)  4.74 L    B)  0.474 L    C)  47.4 L    D)  2.11 L    E)  0.00211 L

 

      52.  A bottle of Gatorade has a volume of 591 mL.  What is this volume in fluid ounces?  (1 fluid ounce = 29.57 mL)

            A)  20.0 fl oz    B)  0.0500 fl oz    C)  1.40 ´ 105 fl oz    D)  14.0 fl oz    E)  35 fl oz

 

      53.  A bottle of soda has a volume of 474 mL.  What is this volume in fluid ounces?  (1 fluid ounce = 29.57 mL)

            A)  16.0 fl oz    B)  0.0624 fl oz    C)  1.75 ´ 105 fl oz    D)  17.5 fl oz    E)  30 fl oz

 

      54.  A bottle of fluoride rinse has a volume of 500 mL.  Which of the following equivalences is incorrect?

            A)      V = 0.500 L                                           D)      V = 0.500 m3

            B)      V = 500 cm3                                           E)      both V = 500 cm3 and V = 0.500 m3

            C)      V = 5.00 ´ 10-4 m3                                          

      55.  If the displacement (size) of a motorcycle engine is 1500 cm3, which of the following equivalences is incorrect?

            A)      V = 1500 mL                                         D)      V = 15.00 m3

            B)      V = 1.500 L                                           E)      both V = 1500 mL and V = 15.00 m3

            C)      V = 1.500 ´ 10-3 m3                                        

 

      56.  A box has dimensions of 4.0 cm by 8.5 cm by 2.0 cm.  The volume of the box in mL is:

            A)      34 mL                                                    D)      17 mL

            B)      0.068 mL                                               E)      insufficient information given

            C)      68 mL                                                             

 

      57.  A box has dimensions of 2.5 cm by 3.0 cm by 4.0 cm.  The volume of the box in milliliters and liters is:

            A)      30 mL and 0.030 L                               D)      7.5 mL and 7,500 L

            B)      30 mL and 30,000 L                             E)      3,000 mL and 3.0 L

            C)      7.5 mL and 0.0075 L                                     

 

      58.  A box has dimensions of 3.5 cm by 4.0 cm by 8.0 cm.  The volume of the box in milliliters and liters is:

            A)      112 mL and 112,000 L                         D)      14 mL and 0.014 L

            B)      112 mL and 0.112 L                             E)      14 mL and 14,000 L

            C)      0.112 mL and 112 L                                      

      59.  The proprietor of a rock shop insists that a nugget is pure gold.  If the nugget occupies a volume of 5.40 mL, what would its mass have to be if it were truly pure gold? (dgold = 19.3 g/mL)

            A)  104 g    B)  3.57 g    C)  0.279 g    D)  13.9 g    E)  insufficient information given

 

      60.  If the density of a certain alcohol is 0.785 g/mL, what volume of the alcohol would have a mass of 75.0 g?

            A)      0.955 mL                                               D)      95.5 mL

            B)      58.9 mL                                                 E)      insufficient information given

            C)      75.8 mL                                                          

 

      61.  The density of aluminum is 2.7 g/cm3.  What is the mass of a piece of aluminum foil which is 10.0 cm by 5.0 cm by 0.0018 cm thick?

            A)  0.090 g    B)  3.3 ´ 10-2 g    C)  0.24 g    D)  1.4 ´ 102 g    E)  19 g

 

      62.  If the density of a certain alcohol is 0.785 g/mL, what mass of the alcohol would have a volume of 200.0 mL?

            A)  2.55 g    B)  157 g    C)  200 g    D)  255 g    E)  3.92 ´ 10–3 g

 

      63.  A student exploring the desert finds a piece of metal with a volume of 29.9 cm3.  If this metal has a mass of 337.5 g, which of the following is the metal most likely to be?

            A)      aluminum (density = 2.70 g/cm3)

            B)      sodium chloride (density = 2.16 g/cm3)

            C)      lead (density = 11.3 g/cm3)

            D)      gold (density = 19.3 g/cm3)

            E)      The student discovered a new metal with a density of 0.0886 g/cm3.

 

      64.  If a child's balloon filled with helium were heated with a blow-dryer, the balloon would increase in volume.  What would happen to the density of the helium in the balloon?

            A)      It would decrease.

            B)      It would increase.

            C)      It would remain the same.

            D)      A chemical reaction would occur, so it is impossible to predict.

            E)      The initial statement is incorrect—the volume of the balloon would not increase.

 

      65.  A rubber stopper sinks in water, but floats in methylene chloride.  Place these three substances in order from least density to greatest density.

            A)      rubber stopper < methylene chloride < water

            B)      rubber stopper < water < methylene chloride

            C)      water < methylene chloride < rubber stopper

            D)      water < rubber stopper < methylene chloride

            E)      methylene chloride < water < rubber stopper

 

      66.  A diamond will float in water, but sink in carbon tetrachloride.  Place these three substances in order from least density to greatest density.

            A)      water < diamond < carbon tetrachloride

            B)      diamond < water < carbon tetrachloride

            C)      carbon tetrachloride < diamond < water

            D)      diamond < carbon tetrachloride < water

            E)      water < carbon tetrachloride < diamond

 

      67.  An ice cube will sink in hexane, but float in water.  Place these three substances in order from least density to greatest density.

            A)      ice < water < hexane                             D)      water < hexane < ice

            B)      hexane < ice < water                             E)      water < ice < hexane

            C)      hexane < water < ice                                      

 

      68.  If the temperature of a bowl of ice cream increases from -10°C to 25°C, what is the increase in temperature in units of degrees Celsius and Kelvin?

            A)      15°C, 288 K                                          D)      35°C, 35 K

            B)      35°C, 308 K                                          E)      15°C, 273 K

            C)      35°C, 273 K                                                   

 

      69.  If the temperature of water in a freezer decreases from 22°C to -25°C, what is the decrease in temperature in units of degrees Celsius and Kelvin?

            A)      47°C, 320 K                                          D)      3°C, 276 K

            B)      47°C, 273 K                                          E)      3°C, 3 K

            C)      47°C, 47 K                                                     

      70.  Which of the following is not an example of a physical property?

            A)      The boiling point of acetone is 56°C.

            B)      Sand is more dense than water.

            C)      Helium is a gas at room temperature.

            D)      Copper gets a greenish coating on it when exposed to moist air.

            E)      Water is colorless.

 

      71.  Which of the following is not an example of a physical property?

            A)      The boiling point of liquid nitrogen is 77 K.

            B)      Nitrogen is a gas at room temperature.

            C)      Nitrogen is colorless.

            D)      Nitrogen gas is less dense than oxygen gas.

            E)      Nitrogen combines with oxygen in an internal combustion engine to form oxides of nitrogen.

 

      72.  Which of the following is not an example of a chemical property?

            A)      An iron nail will rust in water.

            B)      Sugar will dissolve in water.

            C)      A steak on a hot frying pan will turn brown.

            D)      Gasoline will burn if ignited.

            E)      Water can be decomposed to hydrogen and oxygen.

 

      73.  Which of the following is not an example of a chemical change?

            A)      Water becomes purple as Kool-aid is dissolved in it.

            B)      Aluminum turns white after prolonged exposure to air.

            C)      A piece of charcoal becomes white after it burns.

            D)      Magnesium burns in air to make magnesium oxide.

            E)      Zinc metal reacts with hydrochloric acid to form zinc chloride and hydrogen gas.

 

      74.  Which of the following is not an example of a physical change?

            A)      Ice melts when warmed.

            B)      Dry ice sublimes (converts from a solid to a gas) at room temperature.

            C)      Liquid nitrogen converts to a gas at room temperature.

            D)      Blue copper sulfate crystals dissolve in water to form a blue solution.

            E)      When hydrogen and oxygen gas are mixed in the presence of a spark, water is formed.

 

      75.  Which of the following is not a form of energy?

            A)  chemical    B)  mechanical    C)  temperature    D)  heat    E)  electrical

 

      76.  Which of the following statements is incorrect?

            A)      Energy is the capacity to do work or transfer heat.

            B)      Mechanical work occurs when a force acts over a distance.

            C)      Kinetic energy is the energy possessed by an object due to its position.

            D)      Potential energy can be possessed by chemical compounds.

            E)      A compound releases potential energy when it undergoes a spontaneous chemical reaction.

 

      77.  Which of the following statements is incorrect?

            A)      H2 molecules which are moving faster must have more kinetic energy than slower moving H2 molecules.

            B)      A book stored on a high bookshelf has potential energy.

            C)      A volleyball flying over a net has both kinetic energy and potential energy.

            D)      When gasoline is burned to power an engine, it releases only potential energy.

            E)      The water in a waterfall has kinetic, potential, and mechanical energy.

      78.  Which of the following is not a practice that would be employed by a scientist?

            A)      testing ideas by experimentation

            B)      organizing findings in specific ways

            C)      predicting the outcome of an experiment and then not testing the prediction

            D)      trying to explain why things happen

            E)      making physical models to explain the behavior of matter

 

      79.  Which of the following is not normally a part of scientific inquiry?

             A)  observations    B)  philosophizing    C)  theories    D)  hypotheses    E)  laws

 

      80.  Which of the following statements is incorrect?

            A)      The scientific method is a way of looking at the world that is different from non-science forms of inquiry.

            B)      The scientific method does not allow for the use of inferences, and everything must be proved by direct observation.

            C)      A theory is a tentative explanation of the behavior or properties of matter.

            D)      Scientists must isolate and study one variable at a time when performing experiments.

            E)      A behavior of matter that has universal validity is called a law.

 

      81.  The number 0.005925 correctly expressed in scientific notation is:

            A)      59.25 ´ 10-4                                           D)      5.925 ´ 103

            B)      5.93 ´ 10-3                                             E)      5.925 ´ 10-3

            C)      5.9 ´ 10-3                                                        

 

      82.  The number 0.0416 correctly expressed in scientific notation is:

            A)  4.16 ´ 103    B)  4.2  ´ 103    C)  4.16 ´ 10-2    D)  4.2 ´ 10-3    E)  4.2 ´ 10-2

 

      83.  The number 0.0017400 correctly expressed in scientific notation is:

            A)      1.74 ´ 103                                              D)      1.74 ´ 10-3

            B)      1.7400  ´ 103                                         E)      1.7400 ´ 10-3

            C)      1.74 ´ 10-2                                                      

 

      84.  The number 5.650 ´ 10-2 correctly expressed in decimal form is:

            A)  0.565    B)  0.0565    C)  0.05650    D)  565    E)  565.0

      85.  The number 54,900 correctly expressed in scientific notation is:

            A)  5.49 ´ 104    B)  54.9 ´ 103    C)  5.49 ´ 10-3    D)  5.5  ´ 104    E)  5.49 ´ 10-4

 

      86.  The number 625,000 correctly expressed in scientific notation is:

            A)  6.25 ´ 10-5    B)  6.25 ´ 10-4    C)  6.3 ´ 105    D)  6.2 ´ 105    E)  6.25 ´ 105

 

      87.  The correct answer for the product (6.45 ´ 105) ´ (1.2  ´ 104) is:

             (considering significant figures)

            A)      7.7  ´ 109                                               D)      7.7  ´ 1011

            B)      5.375  ´ 101                                           E)      7.74 ´ 1011

            C)      7.74  ´ 109                                                      

 

      88.  The correct answer for the product (8.2 ´ 10-3) ´ (2.84  ´ 105) is:  (considering significant figures)

            A)  2.3288 ´ 103    B)  2.3 ´ 103    C)  2.3 ´ 104    D)  2.3 ´ 105    E)  2.33 ´ 102

 

      89.  The correct answer for the product (6.1 ´ 104) ´ (3312) is:  (considering significant figures)

            A)      2.020 ´ 108                                            D)      2.02032 ´ 108

            B)      2.02  ´ 108                                             E)      2.0  ´ 108

            C)      2.0  ´ 109                                                        

 

      90.  What is the correct answer to the following mathematical operation expressed to the appropriate number of significant figures?

           

 

 

            A)  4 ´ 1019    B)  4.4 ´ 1019    C)  4.42 ´ 1019    D)  4.418 ´ 1019    E)  4.42 ´ 1018

 

      91.  What is the correct answer to the following mathematical operation expressed to the appropriate number of significant figures?

           

 

            A)  12.0  ´ 104    B)  1.9    C)  19    D)  19.1    E)  19.195

 

      92.  When the mathematical operation is carried out, how many significant figures should be reported in the answer?

           

 

            A)  1    B)  2    C)  3    D)  4    E)  5

 

      93.  When the mathematical operation is carried out, how many significant figures should be reported in the answer?

           

 

            A)  1    B)  2    C)  3    D)  4    E)  5

 

      94.  The correct answer for the subtraction 28.645 g – 22.105 g is:  (considering significant figures)

            A)  6.54 g    B)  6.54 ´ 10-1 g    C)  6.540 g    D)  6.5400 g    E)  6.54 ´ 101 g

 

      95.  The correct answer for the addition 56.234 + 0.0021 g is:  (considering significant figures)

            A)  56 g    B)  56.24 g    C)  56.2361 g    D)  56.236 g    E)  56.255 g

      96.  The correct answer for the addition 102.5 mL + 6.55 mL is:  (considering significant figures)

            A)  109.05 mL    B)  109 mL    C)  109.0 mL    D)  109.050 mL    E)  108.15 mL

 

      97.  How would you report the value at the peak of the graph shown below assuming the y-axis is in units of cm?

           

 

            A)  18 cm    B)  18.0 cm    C)  18.00 cm    D)  20 cm    E)  20.0 cm

 

      98.  If a jet's cruising altitude is 32,200 ft (to three significant figures), this distance in km is:  (1 mile = 1.61 km; 1 mile = 5280 ft)

            A)      9.8186 km                                             D)      2.737 ´ 108 km

            B)      9.82 km                                                 E)      2.00 ´ 104 km

            C)      1.06 ´ 108 km                                                 

 

      99.  If a car is traveling at 97 km/hr, what is its speed in mi/hr?  (1 mile = 1.61 km)

            A)      1.6 ´ 102 mi/hr                                       D)      6.0 ´ 102 mi/hr

            B)      156 mi/hr                                               E)      3600 mi/hr

            C)      60.2 mi/hr                                                       

 

    100.  The American Heart Association recommends that for every 1000 dietary calories consumed, the sodium intake should be 1000 mg or less and should not exceed a daily limit of 3300 mg for an adult.  What is the yearly limit on sodium intake in pounds?

            A)  7.3 ´ 10–3 lb    B)  2.7 lb    C)  730 lb    D)  1.2 ´ 103 lb    E)  1.2 ´ 106 lb

 

    101.  Water is considered a mixture because it consists of hydrogen and oxygen.

    102.  The larger the sample of a given substance, the more dense it is.

 

    103.  A glass of tea with ice cubes in it is an example of a heterogeneous mixture.

 

    104.  A “law” in science is a rule that is enacted by a group of influential scientists.

 

    105.  The law of conservation of mass states that the mass of the products of a chemical reaction is equal to the mass of the reacting substances.

 

    106.  Scientific theories are explanations of natural behavior.

    107.  The symbol (w) means “dissolved in water.”

 

    108.  The symbol H2O(aq) is the normal way to represent the compound water.

 

    109.  The changes shown in the diagram represent a physical change.

 

    110.  If the number 6.2510 is rounded to 2 significant figures, it would be reported as 6.3.

 

    111.  The symbol for the element sodium is S.

 

    112.  The symbol for the element cobalt is CO.

 

    113.  A bottle of  liquid mercury has a mass of 5.00 ´ 102 g.  What is the volume of the mercury in mL?  (dmercury = 13.6 g/mL)

 

    114.  Pentane has a boiling point of 36oC.  What is this temperature equivalent to in K?

 

    115.  A pump for a small swimming pool will circulate 3.00 ´ 102 gallons per hour (gph) through the filter.  If the pool contains 1.30 ´ 103 gallons of water, how long will it take to filter the entire contents of the pool?

 

    116.  If the price of gasoline is $2.45/gallon, what would the price be per liter of gasoline?

            (1 L = 1.057 qt., 4 qt. = 1 gal.)

 

    117.  The samples shown in the figure have the same mass.  Which one has the greater density?  Explain your answer.

 

    118.  Describe each of the images in the figure as an element, compound, or mixture.

 

    119.  Elemental neon exists as a gas at room temperature.  At a temperature of 20° K, the neon would be in the liquid phase.  Draw molecular-level pictures of what neon might look like in the liquid and gas states.

    120.  The length of a sofa is 2.05 m.  Convert this length to units of cm.

 

    121.  The length of a sofa is 2.05 m.  Convert this length to units of mm.

 

    122.  The length of a sofa is 2.05 m.  Convert this length to units of km.

 

    123.  The density of iron is 7.9 g/cm3.  What is the mass of a plate of iron that is 1.0 m long by 0.50 m wide by 1.5 cm thick?

 

    124.  The density of iron is 7.9 g/cm3.  If  453.6 g = 1 pound, what is this mass in pounds?

 

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