1.26.11

Announcements: Study for tomorrows mole quiz and the other upcoming quizzes.

Homework: Journal pages 7-8

Today we started with a new mole lab, testing the mass of different elements, how many moles are in the molecule and how many molecules are in the mole. For each of these ways you have to use conversion factors.

For example finding how many moles in krypton.

2.7 x 10^14 x 1mol/6.02 x 10^23

=4.49 x 10^-14

Also finding how many atoms are in an mol.

Ex. Aluminum atoms

89.35 x 6.02 x 10^23/1mol

= 5.38 x 10^15

Next Scriber- Peter

Friday 9.10.10

Today in class at the beginning Mr. Paek talked about our lab reports and how to add on to them. He also told us that if we didn't yet on the google apps documents for school share your report with him. After we did that we did some review with unit conversion problems. One of them for example was 350 cm to yards. To do this you have to cancel out cm by finding out how many cm in 1 m, which is 100. Then divide 350 cm by 100 and multiply it by the remaining 1. Next after we did a few problems like that, Mr. Paek told us about were going to start having most of our HW assignments online. To get to these you have to log onto your moodle account and on the main page there is a link that says Link to WebAssign. You then have to click on that and it takes you to the sign in page. Where it says username it is your id number, the institution is glenbrooksouth.il and the password is also your id number, you'll be able to change the password later. Last we went to the science lab to work on the web assignments.