Popcorn Lab*

             Yesterday Logan, Kendra, and I composed a lab that cooked popcorn. the first thing we did was: add vegetable oil into a 1000-ml beaker to cover the bottom. Then make a tight fitting cover for the beaker from the aluminum foil, then weigh the beaker, oil cover and record the mass which was 200g. Next, we added 30 kernels of popcorn to the beaker and replace the lid. And weigh the beaker with popcorn inside it and recorded the mass which was 204g. Then I poke holes in the foil and placed it on the ring stand to pop. When it finished popping we removed the foil from the top. Then let it cool off and weigh he beaker with the popcorn inside it, and recorded the mass which as 202g.

Section 11.4 Empirical & Molecular Formulas*

IDENTIFICATION OF UNKNOWN ELEMENTS*

SAMPLE        ELEMENT SYMBOL 

A                    Ca                                     
B                    Al
C                    Co
D                    Bi
E                    Zn
F                    Zn
G                   Ni
H                   Pb
I                     Fe
J                    Sn


NUMBER OF MOLES

A 0.163 mol
B 0.9095 mol
C 0.160 mol
D 0.258 mol
E 0.2196 mol
F 0.7545 mol
G 0.4922 mol
H 0.4301 mol
I 0.3814 mol
J 0.2586 mol

WEIGHT OF SAMPLE

6.55
24.5
9.44
14.28
49.26
28.65
89.12
21.29
30.66



Kendra, Logan and I did a lab this week and we had to figure out what each sample was. First, we picked a sample and weighed it, after we got the weight we divided it by the number of moles that where in that sample and then we looked at a periodic table and looked at its atomic mass and if it was the same as the number we got dividing then that was the element's name. This lab was fun and it helped me understand a lot more about the periodic table and exactly how to identify elements. :)

Conductivity Lab*