HON CHEMISTRY: Hey guys, here’s the lecture from Friday on the intro to stoichiometry. You did a great job. Now all you need is some practice and you’ll have it down pat!
CHEMISTRY: Good luck in studying for the test tomorrow! Here’s an old test review. Will it help? Also, a “Stuff to Know” sheet for chapter 7 is on Edline. I know it seems like a lot, but you can do it! First priority – make sure you can write and name chemical formulas!!! Practice, practice, practice! Then start practicing the different kinds of problems – do at least two of each one of them. Good luck – I’ll be praying for you!
PHYSICS: So why do instruments that are playing the same note sound so different? Here’s the lecture from Wednesday on harmonics & beats. And how did you like “seeing” sound. Here’s the link to The vOICe Java Applet that I showed you in class today. Click on the name, or it’s at http://www.seeingwithsound.com/javoice.htm
CHEMISTRY: Well, we finally finished the chapter! Did you realize molecules could be that large? And so many of them. But don’t you think polymers are cool? Some items for contemplation: why are certain plastics recyclable and others not…and what about dishwasher and microwave safe?
HON CHEMISTRY: Well, here it is, the last of the lectures from chapter 8. A couple of things – make sure you’ve memorized the activity series, but just as importantly, make sure you know how to use it! Those guidelines I gave you in class should really help. Good luck as you study for the test on Thursday! I’ll be praying for you!!
CHEMISTRY: Great job on empirical and molecular formulas today. The hardest part is that it’s not a set formula for you to plug and play, but if you’ll keep in mind that you’re really just looking for subscripts which are just moles, you’ll be able to think it through. Percent to mass, mass to moles, moles to smallest whole number ratio. Don’t forget the step where you have to divide all the moles by the smallest number of moles. And then, remember that little added step you might have to add to the end, if you have a decimal. If you can get empirical formulas, you can do molecular formulas. It’s just like writing empirical formulas, but with a twist at the end!
Have a wonderful spring break! And don’t forget to pray for everyone on mission trips! See ya next Monday all rested and ready to go!