1) Explain the following terms briefly: (6 pts)
a) Avogadro's Number:
 

b) Tyndall effect:
 

c) supersaturated solution:
 
 
 

2) How much weight is in a 0.25L liquid that has a density of 1.05g/mL. (4pts)
 
 
 
 
 
 
 

3) What is the volume of a gas at 25^oC if it occupies a volume of 2.5L at 15^oC? (4 pts)
 
 
 
 
 
 
 
 

4) Find nitrogen from the periodic table and write the following:        (6 pts)
a) the number of neutrons, protons and electrons
 
 

b) the valence electrons
 
 

c) the electronic configuration
 
 
 
 

5) Arrange the following in increasing order of size:        (4 pts)
a) B, Al, Ga
 

b) F^-, Cl^-, Br^-
 

6) Give the formula or name (as required) for the following compounds:    (12 pts)
 

a) Sn(NO3)4	b) Magnesium bicarbonate
c) N2O4	d) CuCl2
e) Iron (II) oxide	f) sulfur dichloride

6) Balance the following equation and answer the questions: (2 + 9 pts)
    Al    +      H₂SO₄          =         H₂       +   Al₂(SO₄)₃

a) how many liters of hydrogen are produced from 2.6 g of sulfuric acid?
 
 
 
 

b) how much aluminum is required to form 2.57g aluminum sulfate?
 
 

c) how many atoms of aluminum are required to produce 3.05 x 10²³ molecules of hydrogen?
 
 
 

7) Consider the following reaction:    (7 pts)
                   CO₂    +      NO  +     49kcal    in equilibrium with         CO     +    NO₂
what would happen to the concentration of NO and the equilibrium if:
a) the concentration of CO was decreased:
 

b) the temperature was decreased;
 
 

c) the pressure of the container was decreased.
 
 

8) Balance the following nuclear equation:   (4 + 2 + 4 pts)
a)            ?          =     ²²²Rn₈₆          +      ⁴He₂
 
 

b)   ²⁸Al₁₃           =  ?                 +        ⁰e_-1
 

What are the particles released in both equations? Give two properties each of the particles.
 

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