1. Explain the difference between elements and compounds in terms         
   of Dalton's Atomic Theory.                                             

     In a element, all of the atoms are the same.  A compound            
     contains different types of atoms since it contains atoms of            
     different elements.  Additionally, the atoms are united in 
     simple whole numbers.                                                  

                                                                         
2. Suppose a sample of water contains 46,000,000,000,000                  
  molecules of water.                                                    
  How many oxygen atoms are in the sample ? 46,000,000,000,000
                                                                         
  How many hydrogen atoms are in the sample? 92,000,000,000,000
                                                                         
3. Balance the following chemical equations.



   2H2    +   O2       -->    2H2O

   2Mg    +   O2       -->    2MgO

   2Al    +   3Cl2     -->    2AlCl3

   3KOH   +   H3PO4    -->    K3PO4    +    3H2O

   C3H8  +   5O2       -->    4H2O     +    3CO2

   P4    +   5O2       -->    P4O10

   CH4   +   2O2       -->    2H2O     +    CO2

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

   S8    +   8O2       -->    8SO2


4. Predict the following products and write a balanced equation
  for the following reaction:



   2C6H14   +   19O2   -->    14H2O    +   12CO2


5. Give an example of a chemical reaction that produces a large
  amount of thermal energy.



    The combustion of any hydrocarbon such as in 4 above.


6. Name a device that will convert chemical energy into
  electrical energy.


    Battery


7. Name a device which will convert chemical energy into
  mechanical energy.


    Internal combustion engine



8. Name a device which will convert chemical energy into heat.



    Burner, stove, furnace



9. Name a device which will convert electrical energy into
  radiant energy.


            Light bulb