College Preparatory Chemistry Test-Sandomir

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					MODIFIED ON 09/29/12                                                                                 1


                   College Preparatory Chemistry Test Pre-Final 1-Sandomir

I.        Density, Physical/Chemical Properties of Matter

Use the following data when answering items 1

Chemical                Molar Mass       Density         Chemical        Molar Mass        Density
                         (g/mole)         (g/ml)                          (g/mole)          (g/ml)
Magnesium                  24.3            1.74          Water               18              1.00

Aluminum                   26.9            2.70          Carbon              154            1.59
                                                         Tetrachloride
Lead                      207.2            11.3          Mercury            200.6           13.6

Iron                       55.8            7.87          Ethyl Alcohol       46             0.79



1.   Ethyl alcohol, carbon tetrachloride and water are carefully poured together in a test
     tube. Predict the order of layering from top to bottom.

     a.     water, ethyl alcohol, carbon tetrachloride
     b.     carbon tetrachloride, ethyl alcohol, water
     c.     ethyl alcohol, water, carbon tetrachloride
     d.     ethyl alcohol, carbon tetrachloride, water
     e.     carbon tetrachloride, water, ethyl alcohol

2.   An unknown liquid has a mass of 21.230 grams and a volume of 20.690 ml. What is its
     density in g/ml?

     a.    0.974 g/ml
     b.    1.02 g/ml                                21.230   = 1.02
     c.    1.18 g/ml                                20.690
     d.    1.22 g/ml

3.     The density of air at ordinary atmospheric pressure and 25ºC is 1.19 g/L. What is the
       mass in kilograms, of the air in a room that measures 12.5 x 15.5 x 80 ft?

     a.    422
                           15,500 ft3    (12 in)3                                   =522
     b.    522
                                          (1 ft)3
     c.    586
     d.    598
MODIFIED ON 09/29/12                                                                               2


4.    Which of the following graphs shows the proper relationship between the mass (m) of a
      substance and its volume (V)?




      m                       m                   m           m                  m




                        V              V                 V             V                      V
                        a.             b.                c.               d.                  e.



5.    Five 1 peseta coins from Spain were dropped into a graduated cylinder containing 20.20 mL of
      water. The volume of the water increased to 22.05 mL. A single coin had a mass of 0.99 gram.
      What is the identity of the metal used for the Spanish 1 peseta coins?
                 density of aluminum = 2.7 g/mL
                 density of zinc = 7.1 g/mL
                 density of copper = 9.0 g/mL
                 density of silver = 10.0 g/mL


          a      aluminum
          b      zinc
          c      copper
          d      silver


6.    All of the following are physical properties of matter EXCEPT____

     a.       mass
     b.       hardness
     c.       melting point
     d.       color
     e.       explosiveness

7. Which of the following does NOT involve a chemical change?

     a.       a cube of sugar dissolving in hot coffee
     b.       exploding dynamite
     c.       tarnishing silverware
     d.       burning hydrogen gas
MODIFIED ON 09/29/12                                                                       3


8.    Which of the following is a homogeneous mixture?

     a.   Ocean sand
     b.   Distilled water
     c.   Aqueous sodium chloride
     d.   Air at Standard Temperature and Pressure



9.    Which subatomic particles are equal in mass?

     a.   proton, electron
     b.   neutron, proton
     c.   electron, neutrino
     d.   electron, neutron

10. Which of the following is NOT attributed to the work of J.J Thomson?

     a.   Atoms are made up of electrons have the same ‘charge to mass’ ratio
     b.   Atoms are made up of nuclei that are small, dense, and positively charged.
     c.   Atoms are made up of particles that are negatively charged.
     d.   Cathode rays deflect in an electrical field.

Keep in mind that Thomson’s major contribution did not include the discovery of the
nucleus. We can Thank Rutherford for that.

11. The physicist who experimentally determined both the charge and the mass of a single
    electron was ___.

     a.   John Dalton
     b.   Sir William Crookes
     c.   J.J. Thomson
     d.   Robert Millikan
     e.   William Rutherford

12. Which of the following is NOT correct:

     a.   Alpha particles are positively charged
     b.   Beta particles can be stopped by plywood
     c.   Gamma particles possess no charge
     d.   Beta particles are smaller than alpha particles

While gamma rays might be considered particle-waves as are other forms of
electromagnetic radiation, they are not particles in the same sense as alpha and beta
particles.
MODIFIED ON 09/29/12                                                               4




13. Which of the following atoms contain 24 neutrons?

   a.    52
               Cr
         24

          24
               Mg
   b.     12


         112
               Cd
   c.     48


          45
   d.          Sc
          21


          42
   e.          Ca
          20


14. Which is the following are attributable to the work conducted by Neils Bohr.

   a.   Electrons can be found in regions of high probability
   b.   Electrons possess specific charges and masses
   c.   Electrons possess wave properties
   d.   Electrons are located quantum energy levels

15. Which of the following is the electron configuration of Sulfur (S)?

   a.   1s22s22p63s23p63d104s24p4
   b.   1s22s22p43s23p64s23d104p4
   c.   1s22s22p63s23p64s23d104p4
   d.   1s22s22p43s23p43d104s24p4

				
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