Mole Lab

https://docs.google.com/spreadsheet/ccc?key=0AjkWV4xnDvHUdHM5bk9TWS1FZERtMFpOVkhrZlJiWnc#gid=1

This is the link to show our mole lab.  This just shows we figured out what types of metals it was, I will  post our work on here later when I find the paper.

Popcorn Lab

           Material                                     weight (in grams)

popcorn  kernels                                 3.82           

oil                                                       2.72           

Combined kernels and oil                  6.54           

Combined weight after popped         6.28            

Procedure

     In this lab we were finding out the percent of water that a popcorn kernel has in it.  To do this we had to find the weight of the kernel before it is popped.  The water is what causes the kernel to pop, because it gets hot.  When it gets hot it splits the kernel and turns into vapor.  So we counted out thirty kernels into the beaker, and put just a bit of oil in to speed up the popping time.  After we had the weight of the two which was 6.54 grams we put the kernels onto a hot plate.  The hot plate took awhile to make the kernels begin popping but once they started it didn't take long.  After every one of the kernels was popped we took the beaker off the hot plate and weighed it for a second time.  This time we got that weight was 6.28grams, a .26 gram difference.  So to find the percent of water you have to take the weight of just the popcorn kernels which was 3.82 and divide it by .26 the difference after popped.  The math comes out to be .068 which shows you that it is 6.8 percent water in the kernel.

Empirical and Molecular Formulas

Mole Calculation Worksheet