CHE105/107 EXAM

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gatorlea92
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117150
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CHE105/107 EXAM
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2011-11-15 21:54:44
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CHEMISTRY EKU
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  1. The number of valence electrons found in an atom of a Group A element is equal to
    its group number
  2. Valence electrons are located
    in the outermost energy level of an atom
  3. In an electron-dot structure of an element, the dots are used to represent
    the valence electrons
  4. How many valence electrons are in the electron-dot structures for the elements in group 3A?
    3
  5. How many electrons will aluminum gain or lose when it forms an ion?
    lose 3
  6. How many electrons will chlorine gain or lose when it forms an ion?
    gain 1
  7. The compound MgCl2 is named
    magnesium chloride
  8. In a molecule with covalent bonding
    atoms are held together by sharing electrons
  9. In a covalently bonded molecule, the number of electrons that an atom shares with others is usually equal to the the number of electrons
    needed to give it a noble gas arrangement
  10. The correct name for the compound N2O3 is
    dinitrogen trioxide
  11. What is the formula of carbon tetraiodide?
    CI4
  12. The ability of an atom to attract the shared electrons in a covalent bond is its
    electronegativity
  13. The name of Al2(SO4)3 is
    aluminum sulfate
  14. Ionic bonding is expected in which of these compounds?
    KF
  15. Which one of the following is a characteristic of a base?
    has a slippery, soapy feel
  16. The correct formula for sulfuric acid is
    H2SO4
  17. The name of Al(OH)3 is
    aluminum hydroxide
  18. Which of these statements correctly describes the hydronium-hydroxide balance in the given solution?
    In bases, [OH-] is greater than [H3O+]
  19. For Kw, the product of [H3O+] and [OH-] is
    1 X 10-14
  20. What is the [H3O+] in a solution with [OH-]= 1 x 10-12M?
    1X10-2M
  21. What is the [OH-] in a solution that has a {H3O+] = 1X10-6M?
    1X10-8M
  22. Which of the following is correctly identified?
    NaOH, strong base
  23. Ammonium hydroxide is a weak base because
    it dissociates only slightly in water
  24. The function of a buffer is to
    maintain the pH of a solution
  25. The normal blood pH is about
    7.4
  26. What is the name of the medical condition of an asthmatic patient with a blood pH of 7.30?
    respiratory acidosis
  27. If a condition of hypoventilation occurs, the blood pH of the patient is expected to
    decrease
  28. When hyperventilation (rapid breathing) causes a patient to exhale large amounts of CO2, the blood pH rises in a condition called
    respiratory acidosis
  29. Which of the following is a neutralization reaction?
    HNO3 + KOH -> H2O + KNO3
  30. Which of the following is NOT part of the kinetic theory of gases?
    there is very little empty space in gas
  31. According to the kinetic theory of gases, particles of a gas
    are very far apart
  32. The force of gas particles against the walls of a container is called
    pressure
  33. The unit of 1 atmosphere used to describe the pressure of a gas is equal to
    760 mm Hg
  34. A 5.00-L tank contains helium gas at 1.50 atm. What is the pressure of the gas in mm Hg?
    1140 mm Hg
  35. In response to Boyle's law, the pressure of a gas increases as the volume decreases because
    the gas particles strike the walls of the container more often
  36. Which of the following correctly describes the process of inspiration (air entering the lungs)?
    the lungs expand, causing their internal pressure to decrease
  37. The volume of a gas with a pressure of 1.2 atm increases from 1.0 L to 4.0 L. What is the final pressure of the gas, assuming constant temperature?
    0.30 atm
  38. [ballon diagram]
    The balloon is put into a chamber whose pressure is less than the atmospheric pressure.
    C; big balloon
  39. [balloon diagram]
    The temperature is changed from 50*C to -150*C at constant pressure.
    A; smallest balloon
  40. Complete the following statement: In Charles' law, the volume of a gas ____ when the ____ decreases.
    decreases, temperature
  41. A diver exhales a bubble with a volume of 250 mL at a pressure of 2.4 atm and a temperature of 15*C. What is the volume of the bubble when it reaches the surface where the pressure is 1.0 atm and the temperature is 27*C?
    630 mL
  42. Which of the following correctly describes the partial pressures of gases in the body?
    high O2, low CO2, oxygenated blood
  43. A gas sample in a closed, expandable container of initial volume 5.00 L was allowed to warm from 25*C to 35*C. What was its new volume?
    5.17 L
  44. In a solution, the solvent
    can be a solid, liquid, or gas
  45. A solution is prepared by dissolving 2 g of KCl in 100 g of H2O. In this solution, H2O is the
    SOLVENT
  46. Oil does not dissolve in water because
    oil is nonpolar
  47. In water, a substance that ionizes completely in solution is called a
    strong electrolyte
  48. An equivalent is
    the amount of ion that carries 1 mole of electrical charge
  49. The mass/mass percent concentration refers to
    frams of solute in 100 g of solution
  50. What is the concentration, in m/m% of a solution prepared from 50.0g NaCl and 150.0g of water?
    25.0%
  51. Rubbing alcohol is 70% isopropyl alcohol by volume. How many mL of isopropyl alcohol are in a pint (473 mL) container?
    330 mL
  52. In the process known as osmosis, ___ moves through a semipermeable membrane into an area of ______ concentration.
    solvent, lowersolvent
  53. A solution with the same osmotic pressure as the blood is
    isotonic to the blood
  54. A solution that has an osmotic pressure less than that of red blood cells is called
    hypotonic
  55. A red blood cell will undergo crenation in
    7% NaCl
  56. Which solution is isotonic to a red blood cell?
    0.9% NaCl
  57. A red blood cell will undergo hemolysis in
    water
  58. What volume of 0.10M NaOH can be prepared from 250 mL of 0.30 M NaOH
    0.75 L

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