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MOCK TEST #5

Chemistry 10
Instructor - Mrs. Walker Waugh

Directions:  Mark all answers on Scantron 882-ES.  The Instructor will not be responsible for your errors, therefore erase clearly.  YOU MUST PRESENT YOUR WORK TO THE INSTRUCTOR OR IT WILL BE UNACCEPTABLE.  

  1. An atom with an electron configuration of 1s2 2s2 2p3 has how many valence electrons?
    1. 2
    2. 3
    3. 4
    4. 5
    5. 7

    2.  The _________  sublevel of an atom has a total of five orbitals.

    1. s
    2. p
    3. d
    4. f
    5. g

    3.  You give a child a balloon, and he goes outside with it to play in the snow.  Soon, he returns crying.  What happened?

    1. The balloon expanded and burst.
    2. The balloon froze solid.
    3. The balloon shrank.
    4. The balloon dissolved.
    5. The child forgot Charles’ Law.

    4.  What kind of bonding occurs in the compound potassium oxide.

    1. ionic
    2. nonpolar covalent
    3. ionic polar single bond
    4. covalent polar single bond
    5. nonpolar ionic bond

     5.  A gas with a temperature of 21.0oC and a volume of 10.0 L is compressed to 5.00 L.  What will be the new temperature?

    1. 10.5 oC
    2. 420. oC
    3. 42.0 oC
    4. –126 oC
    5. 315 oC

    6. Which of the following sublevels does not exit as written?

    1. 3f
    2. 6f
    3. 2s
    4. 5d
    5. 8s

    7.  What is the molecular shape of PH3?

    1. tetrahedral
    2. trigonal planar
    3. bent
    4. linear
    5. trigonal pyramidal

    8.  What is the percent  by mass concentration of sodium bromide in a solution which contains 50.0 g of sodium bromide in 200.0 g of water?

  1. 40.0 %
  2. 20.0 %
  3. 25.0 %
  4. 33.3 %
  5. 50.0 %  

    9.  How many milliliters of 6.00 M HCl solution would be required to prepare 2.00 L of 0.140 M HCl by dilution?

  1. 420 mL
  2. 168 mL
  3. 85.6 mL
  4. 46.7 mL
  5. 30.0 mL

    10.  What is the molar concentration of 2000. mL of aqueous solution containing 135 g of glucose, C6H12O6?

  1. 12.15 M
  2. 0.750 M
  3. 67.5 M
  4. 0.667 M
  5. 0.375 M

      11.  What is the formula of copper (II) sulfate, pentahydrate?

  1. Cu2(SO4)2 . 5 H2O
  2. Cu2(SO4) . 5 H2O
  3. CuSO4 . 6 H2O
  4. CuSO4 . 5 H2O
  5. None of the above

    12.  What is the electron configuration for the nitride ion?

a.        N5:  1s2 2s2 2p1

b.       N7:  1s2 2s2 2p3

c.        N7: 1s2 2s2 2p5

d.       N10: 1s2 2s2 2p6

e.        None of the above

   13.  A tank has a pressure of 30.0 atm at a temperature of 22.0oC.  After heating, the temperature rises to 35.0oC.  What is the new pressure?

  1. 54.3 atm
  2. 31.3 atm
  3. 28.7 atm
  4. 47.7 atm
  5. 30.6 atm

    14.  Which pair is immiscible?

  1. ethanol and water
  2. water and octane, C8H18
  3. isopropyl alcohol and water
  4. acetic acid and water
  5. octane and oil  

    15.  How many grams of sodium hydroxide are required to prepare 250.0 mL of a 6.00 M solution?

  1. 1.50 g
  2. 0.0375 g
  3. 0.600 g
  4. 3.75 g
  5. 60.0 g

    16.  5.60 L of a gas at STP has a mass of 13.0 g.  What is the molar mass of the gas?

  1. 33.2 g/mol
  2. 66.4 g/mol
  3. 26.0 g/mol
  4. 52.0 g/mol
  5. none of the above

  17.  What volume of 0.62 M sodium hydroxide is required to neutralize 20.00 mL of 0.391 nitric acid?

Sodium hydroxide + nitric acid yields (you know)

  1. 23.6 mL
  2. 16.9 mL
  3. 9.03 mL
  4. 11.8 mL
  5. none of the above

    18.  How many moles are in 20.0 g of sodium carbonate?

  1. 1.89 mol
  2. 212 mol
  3. 2.12 x 103 mol
  4. 0.189 mol
  5. 18.9 mol

    19.  The percent of nitrogen in magnesium nitride is

  1. 27.8%
  2. 36.6%
  3. 16.1%
  4. 72.2%
  5. 63.4%

    20.  What is the molar concentration of 250. mL of aqueous solution containing 48.8 g of glucose, C6H12O6?

  1. 5.12 M
  2. 0.923 M
  3. 0.271 M
  4. 1.08 M
  5. 0.195 M
    21.  How many grams of aluminum metal will react with 0.0500 mole of oxygen gas according to the equation given:

Aluminum   +   Oxygen     ̉    Aluminum Oxide

    1. 1.35 g
    2. 1.01 g
    3. 4.32 g
    4. 2.06 g
    5. 1.80 g

    22.  For the equation given, how many grams of methane will react with 125 g of oxygen?

Methane (CH4) burns to produce (you know)

  1. 39.1 g
  2. 19.5 g
  3. 15.6 g
  4. 31.3 g
  5. 62.5 g

For Problems 23 - 24, refer to the equation:

phosphoric acid reacts with magnesium carbonate to produce (you know)

    23.   From the balanced chemical equation the coefficient of the magnesium phosphate is:

    a.  1
   
  b. 2
     c.  3
     d.  4
     e.  none of the above 

    24.  If 50.0 g of magnesium carbonate reacts completely with phosphoric acid, the grams of gas produced is

   a.  52.2 g
    b.  26.1 g
    c.  13.1 g
    d.  50.0 g
    e.  55.0 g

    25. How many molecules are in 5.8 g of acetone, C3H6O?

   a.  0.10 molecules
    b.  6.0 x 1022 molecules
    c.  3.5 x 1024 molecules
    d.  6.0 x 1023 molecules
    e.  none of the above

   26.  The reaction:
                                                aluminum reacts with bromine to produce aluminum bromide

is an example of:

   a.  combination
    b.  single displacement
    c.  decomposition
    d.  gaseous
    e.  precipitation

    27.  How many moles of aluminum bromide are produce in the above reaction.

    a.  1
    b.  2
    c.  3
    d.  4
    e.  none of the above

    28.  How many moles of oxygen are required for the complete reaction of 45g of C2H4 when it is burned?

    a.  1.3 x 102 mol
    b.  0.64 mol
    c.  112.4 mol
    d.  4.8 mol
    e.  none of the above

    29.  If 14.0 g of C2H4 is burned and the actual yield of water is 7.84 g, the percent yield in the reaction is


    a.  0.56%
    b.  43.6%
    c.  87.1%
    d.  56.0%
    e.  82.0%

(NOTE STUDENTS:  This is the end of the exam)

    
                    Answers:

1d 2c 3c 4 e 5 d 6 a 7 e 8 b 9 d 10 e 11 d 12 d 13 b 14 b 15 e 16 d 17 e 18d 19a 20 d 21 a 22 d 23 a 24 b 25 b 26 a 27 b 28 d 29 b

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