1. Discuss how Dalton's Atomic Theory accounts for the Law of 
  Conservation of Matter.  
    

    
    Dalton's Atomic Theory states that atoms are indestructible in 
    chemical reactions, and atoms of one element cannot be converted 
    into those of another. The number of atoms of an element in the 
    products of a chemical reaction are the same as was in the reactants.  
    Therefore the total weight of the products MUST BE the same as the 
    total weight of the reactants.  

   
2. Trace the steps involved in the conversion of the chemical  
  energy of the compounds in natural gas into electrical energy 
  in a gas fired power plant.  
    

        
    Natural Gas is burned in a furnace releasing thermal energy.  The 
    thermal energy is used to heat water to steam.  The steam is allowed 
    to escape through a turbine spinning the turbine (changing thermal 
    energy into mechanical energy) which in turn spins a generator (changing  
    mechanical energy into electrical energy).  


3. Write a balanced equation for the combustion of butane, C4H10. 


          2C4H10  + 13O2  ---> 8CO2  + 10H2O


4. Express the following numbers in scientific notation. 


   3240000 = 3.24 x 106 

   1090000000000 = 1.09 x 1012 

   0.0000000000476 = 4.76 x 10-11 

   9687000000 = 9.687 X 109 

   0.0000047 = 4.7 x 10-6 


5. Perform the following operations: 



   (3.2 x 10-11) x (6.5 x 107)  = 2.1 x 10-4 

   4.6 x 109 
   ----------- = 6.9 x 10-5 
   6.7 x 1013 



6. Perform the following conversions.



   1 cm = 0.3937 inch               1 m = 100cm 
    
   1 mg = 1 x 10-6kg     1 kg = 1 x 10 6 mg 



7. Calculate the density of a liquid if 25 ml of the liquid has a  
  mass of 35 g. 


   35 g / 25 ml = 1.4 g/ml 


8. Perform the following conversions. 


   355 g =  3.55 x 105 mg        248 ml = 0.248 L 

   3.0 pts = 1.4 L       if 355 ml = 12 oz & 16 oz = 1 pt 


9. What is the volume of 13 g of a liquid if its density is 0.85 g/ml ? 


   13 g / 0.85 g/ml = 15 ml