CHM 1040: Final 1/4

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kieu
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81834
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CHM 1040: Final 1/4
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2011-04-25 23:07:52
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CHM Final
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CHM 1040: Final 1/4
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  1. Chemistry is relevant to which of the following areas of study?


    A)
    B)
    C) Biological studies
    D)
    E) All of the above
    C) Biological studies
    (this multiple choice question has been scrambled)
  2. 2.



    ______ is an example of a derived unit - a unit built up from standard units.

    A) Length in feet
    B) Mass in kg
    C) Temperature in fahrenheit
    D) Volume in m3
    E) Time in seconds
    D) Volume in m3
    (this multiple choice question has been scrambled)
  3. Which is not an example of chemistry at work?

    A) Your body converts food into energy.
    B) Arms inspectors use "sniffers" to find dangerous weapons.
    C) Bread rises in a warm oven.
    D) A battery powers your alarm clock.
    E) A rock breaks a mirror
    E) A rock breaks a mirror

    This involves a physical, not a chemical change.
    (this multiple choice question has been scrambled)
  4. Among other things, chemists have learned ______.

    A) literature.
    B) languages.
    C) biology.
    D) critical thinking.
    E) to memorize only facts
    • D) critical thinking.
    • Critical thinking is critical.
  5. A quantitative observation:

    A) does not depend upon numbers.
    B) is a general description.
    C) is a measurement.
    D) describes something exactly.
    C) is a measurement.

    Measurements require numbers.
    (this multiple choice question has been scrambled)
  6. By definition, a mixture has variable

    A) elements.
    B) mass.
    C) color.
    D) composition
    E) phases.
    D) composition
    (this multiple choice question has been scrambled)
  7. Why is a gas much more compressible than a solid?

    A) Solids are rigid.
    B) Gases may flow freely.
    C) Gases have indefinite shape.
    D) Gases are mostly empty space.
    E) Solids break apart easily.
    D) Gases are mostly empty space.
    (this multiple choice question has been scrambled)
  8. Gases have a definite shape.

    A) True
    B) False
    B) False

    A gas will fill any container completely, no matter what its shape.
  9. An approximation:

    A) is sometimes used to simplify science.
    B) is an exact relationship.
    C) is never used in "real" science.
    D) creates error.
    A) is sometimes used to simplify science.
    (this multiple choice question has been scrambled)
  10. Air is

    A) a pure substance.
    B) a solid.
    C) a homogeneous mixture.
    D) devoid of water.
    E) the atmosphere.
    C) a homogeneous mixture.

    Air is a homogenous mixture in one phase (gaseous).
    (this multiple choice question has been scrambled)
  11. A set of hypotheses is called a(n)

    A) natural law
    B) experiment
    C) a model or theory
    D) rule
    C) a model or theory
    (this multiple choice question has been scrambled)
  12. Heating 512 g of iron from 500ºC to 533ºC requires _______ of heat. The specific heat of iron is 0.45 J/ºC g.

    A) 7.6 J
    B) 7600 J
    C) 37500 J
    D) 6.98 J
    E) 119000 J
    B) 7600 J
    (this multiple choice question has been scrambled)
  13. An absolute temperature scale

    A) can be expressed in any unit.
    B) may be no larger than 10000.
    C) is always known.
    D) is always positive.
    E) is never attainable.
    D) is always positive.
    (this multiple choice question has been scrambled)
  14. Arrange the density of a generic substance according to state.

    A) gas ? liquid < solid
    B) liquid > solid > gas
    C) gas > liquid ? solid
    D) gas > liquid > solid
    E) solid ? liquid > gas
    E) solid ? liquid > gas
    (this multiple choice question has been scrambled)
  15. Which of the following statements is qualitative?

    A) That pizza cost only $10.00.
    B) I had to work all night at the pizza parlor.
    C) I ate four slices of pizza last night.
    D) That pizza smells good!
    D) That pizza smells good!
    (this multiple choice question has been scrambled)
  16. A certain substance contains three different elements. It could be

    A) a compound.
    B) Pure water.
    C) An atom.
    A) a compound.

    A compound contains two or more elements.
    (this multiple choice question has been scrambled)
  17. Doing chemistry successfully requires

    A) the right genes.
    B) practice solving problems.
    C) extensive experience.
    D) luck.
    B) practice solving problems.

    Practice familiarizes you with procedures.
    (this multiple choice question has been scrambled)
  18. A(n) _______ gives one possible explanation for an observation.

    A) theory
    B) discussion
    C) natural law
    D) experiment
    E) hypothesis
    E) hypothesis
    (this multiple choice question has been scrambled)
  19. A homogeneous mixture is

    A) always a liquid.
    B) a compound.
    C) granular.
    D) the same throughout.
    E) restricted to a single phase.
    D) the same throughout.

    A homogeneous mixture will be the same throughout at some level.
    (this multiple choice question has been scrambled)
  20. A _______ may not be modified over time.

    A) theory
    B) natural law
    C) chemical equation
    D) hypothesis
    B) natural law

    A natural law is an important conclusion, and is considered to be permanent
    (this multiple choice question has been scrambled)
  21. Round the number 14.449 to three significant digits.

    A) 14.5
    B) 14.0
    C) 14.400
    D) 14.4
    E) 15.0
    D) 14.4
    (this multiple choice question has been scrambled)
  22. The amount of energy required by a process depends upon

    A) the amount of substance.
    B) all of these.
    C) the types of substances involved.
    D) the temperature change.
    E) none of these.
    B) all of these.

    The energy required depends upon all these things.
    (this multiple choice question has been scrambled)
  23. The scientific method:

    A) cannot predict.
    B) depends upon memorization.
    C) is repetative and tedious
    D) is a methodical way to do chemistry.
    E) can prove a theory is true.
    D) is a methodical way to do chemistry.
    (this multiple choice question has been scrambled)
  24. Which of the following is a quantitative observation?

    A) Solid CO2 turns directly into a gas.
    B) Water boils at 100 degrees Fahrenheit.
    C) Water vapor is odorless.
    D) The solution is blue.
    E) The solution has a white solid at the bottom of the beaker.
    B) Water boils at 100 degrees Fahrenheit.
    (this multiple choice question has been scrambled)
  25. Distillation requires

    A) water.
    B) a mixture.
    C) alcohol.
    D) a flame.
    E) expensive tools.
    B) a mixture.
    (this multiple choice question has been scrambled)
  26. Chemistry is a(n) _______ science.

    A) trivial
    B) biological
    C) experimental
    D) performing
    E) difficult
    C) experimental
    (this multiple choice question has been scrambled)
  27. Determine the number of significant figures in the number 0.0250015.

    A) 2
    B) 7
    C) 4
    D) 6
    E) 8
    E) 8
    (this multiple choice question has been scrambled)
  28. Which of the following is not a hypothesis?

    A) Driving a car is faster than walking.
    B) Lead causes learning disabilities in children.
    C) Thorough studying will raise your grades.
    D) My friend's terrier dug a hole in my yard last night.
    E) High-tension lines are dangerous to long-term health.
    A) Driving a car is faster than walking.
    (this multiple choice question has been scrambled)
  29. A scientific test is called a(n)

    A) discussion
    B) hypothesis
    C) experiment
    D) natural law
    E) theory
    C) experiment
    (this multiple choice question has been scrambled)
  30. How many cubes, each of volume 1mL, will be needed to fill up a 15L container?

    A) 150
    B) 15000
    C) 100
    D) 1500
    E) 1000
    B) 15000
    (this multiple choice question has been scrambled)
  31. Physical methods

    A) allow separation of mixtures.
    B) will separate only homogeneous mixtures.
    C) will separate only heterogeneous mixtures.
    D) are ways to cause chemical reactions.
    A) allow separation of mixtures.
    (this multiple choice question has been scrambled)
  32. When magnesium metal burns,

    A) it is a chemical change.
    B) it produces a small amount of heat
    C) it is reversible.
    D) it undergoes a reduction.
    E) it undergoes a physical change.
    A) it is a chemical change.
    (this multiple choice question has been scrambled)
  33. Filtration will separate

    A) a homogeneous mixture.B) substances in an alloy.
    C) a gas from a liquid.
    D) a solid from a liquid.Feedback: Right!
    E) water from an aqueous solution.
    D) a solid from a liquid.

    The filter will hold back the solid.
  34. It takes the same amount of energy to heat 100 g of water from
    50ºC to 100ºC as it takes to heat 100 g of water from 500ºC to 550ºC.

    A) True
    B) False
    A) True

    The amount of energy required doesn't depend upon the beginning or ending temperature of the water.
  35. An alloy is not a mixture.

    A) True
    B) False
    B) False

    An alloy is a homogeneous mixture of metals.
  36. Debate in science:

    A) provide a way to air and modify theory.
    B) distracts from real work.
    C) eventually cause theories to fail.
    D) should not occur if the science is done properly.
    A) provide a way to air and modify theory.

    Debate is a natural part of the scientific method.
    (this multiple choice question has been scrambled)
  37. The standard (SI) unit of length is the _______.

    A) meter
    B) centimeter
    C) inch
    D) yard
    E) foot
    A) meter
    (this multiple choice question has been scrambled)
  38. Sand and oil would form

    A) an alloy.
    B) a miscible liquid.
    C) a homogeneous mixture.
    D) a heterogeneous mixture.
    E) a messy solution.
    D) a heterogeneous mixture.

    Heterogeneous means (at least) two phases.
    (this multiple choice question has been scrambled)
  39. How many gallons of water is 1750 mL? 1 gal = 4 qt; 32 oz = 1 qt; 29.6 mL = 1 oz.

    A) 473 gal
    B) 2.16 gal
    C) 0.46 gal
    D) 4.73 gal
    E) 5 gal
    C) 0.46 gal
    (this multiple choice question has been scrambled)
  40. Uncertainty is measurement is:

    A) a sign of a poorly-executed experiment.
    B) unavoidable and expected.
    C) as large as the measurement itself.
    D) unnecessary.
    B) unavoidable and expected.
    (this multiple choice question has been scrambled)
  41. The prefix "d" means

    A) 0.001
    B) 0.1
    C) 1000
    D) 100
    E) 10
    B) 0.1
    (this multiple choice question has been scrambled)
  42. The SI unit of energy is defined as:

    A) the calorie.
    B) the joule.
    C) the kilocalorie.
    D) work.
    E) It is not defined.
    B) the joule.
    (this multiple choice question has been scrambled)
  43. A substance that cannot be broken down into another substance is called

    A) divisible.
    B) a compound.
    C) an ion.
    D) an element.
    E) a dimer.
    D) an element.
    (this multiple choice question has been scrambled)
  44. Which of the following is a chemical property of copper?

    A) Copper is a solid at room temperature.
    B) Copper turns green when exposed to air.
    C) Copper is used in coins.
    D) Copper is a soft metal.
    E) Copper conducts heat well.
    B) Copper turns green when exposed to air.
    (this multiple choice question has been scrambled)
  45. Which of the following is not representative of a physical property?

    A) Water reacts with sodium metal.
    B) The density of water is 1 g/mL.
    C) Water freezes at 0ºC and 1 atm pressure.
    D) Water boils at 100ºC and 1 atm pressure.
    E) Water and oil do not mix.
    A) Water reacts with sodium metal.
    (this multiple choice question has been scrambled)
  46. A qualitative observation:

    A) depends upon color.
    B) describes exact amounts.
    C) is a measurement.
    D) is a general description.
    D) is a general description.
    (this multiple choice question has been scrambled)
  47. A physical change

    A) could be a phase change.
    B) could be an explosion.
    C) is also called a reaction.
    D) could be combustion.
    E) involves a change in the fundamental composition.
    A) could be a phase change.
    (this multiple choice question has been scrambled)
  48. Experiments are performed to

    A) create new natural laws
    B) make observations
    C) prove a theory
    D) offer support to a theory
    D) offer support to a theory
    (this multiple choice question has been scrambled)
  49. Given a specific number of significant figures, how many uncertain digits exist in a measurement?

    A) 0
    B) 1
    C) In this case, the number of uncertain digits depends upon the situation.
    D) two
    E) all of them
    B) 1
    (this multiple choice question has been scrambled)
  50. Convert -151ºC to fahrenheit.

    A) 304ºF
    B) -240ºF
    C) -304ºF
    D) 272ºF
    E) 0ºF
    B) -240ºF
    (this multiple choice question has been scrambled)
  51. With regards to significant figures, the main difference between zeroes and non-zero numbers is:

    A) zeroes are never significant.
    B) zeroes are sometimes significant, and non-zero numbers are always significant.
    C) there is no difference.
    D) non-zero numbers are sometimes significant, and zeroes are always significant.
    B) zeroes are sometimes significant, and non-zero numbers are always significant.
    (this multiple choice question has been scrambled)
  52. Determine the density of a new material if 2.81 grams displace a 0.56 mL volume of water.

    A) 5.02 g/cm3
    B) 0.20 g/mL
    C) 14.10 g/mL
    D) 25.2 g/cm3
    A) 5.02 g/cm3
    (this multiple choice question has been scrambled)
  53. What volume of mercury will weigh the same as 150 mL of water?
    The density of water is 1.0 g/mL, and the density of mercury is 13.6
    g/mL.

    A) 110 mL
    B) 2040 mL
    C) 0.09 mL
    D) 150 mL
    E) 11.0 mL
    E) 11.0 mL
    (this multiple choice question has been scrambled)
  54. Learning chemistry has been compared to learning a foreign language.

    A) True
    B) False
    A) True

    It is certainly a symbolic language such as algebra.
  55. Scientific models:

    A) never involve approximations.
    B) are always correct.
    C) need to be very complex.
    D) are useful tools in science.
    D) are useful tools in science.
    (this multiple choice question has been scrambled)

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