Monthly Archives: October 2012

Chemistry 10-22-12 Binary Molecular Formulas

Posted on by

CHEMISTRY: Do you feel like you have letter and numbers swimming in your eyes? This is one of those times that paying attention to details is super, super important! Here’s the lecture from today on writing formulas and names for binary molecular compounds. Part of it’s really similar to what you learned to do last week for ionic compounds, but another part is totally different. Details!!

Make sure you keep everything straight. Do something that will organize all the information for you, so you won’t get confused. Also, don’t forget the lists you have to memorize, especially the one for Friday – polyatomic ions!! And practice, practice, practice!!!


flickr photo by Roger Smith

_________________________________________________________

Hon Chemistry 10-22-12 Percent Composition

Posted on by

HON CHEMISTRY: Great job today… although, it was really weird watching you chew gum in class! I think you’ll find that percent composition problems are super easy to catch on to. Make sure, though, you can write chemical formulas (I won’t give them to you!) and that you’ve memorized the formulas for acids and those common substances from #58. Then, it’s just plug and play from there! πŸ™‚


flickr photo by ΀ϊ΢΢Β₯

Hon Chemistry 10-19-12 Mole Problems & Moles of Chalk Lab

Posted on by

HON CHEMISTRY: Great job on the moles of chalk lab! You set a land speed record for finishing a lab. Good job! At the end of the vodcast, there are instructions for the lab, just in case you were out today. By the way, the lab can be written up on a sheet of paper instead of in your lab books.

How are you doing on the mole problems? Here is the review we did of some of last night’s homework problem. Remember that one of the answers that I listed at the very beginning is wrong – but we corrected that during class.

Speaking of labs, the thLAB: Calculating Moles (the one with the salt and sugar packets) can also be written on a sheet of paper. Make sure you include all your observations (data in a table!), calculations, and answer all the questions. I thought these couple of labs would be a different way for you to practice the whole mole concept. Have a great weekend!!

_______________________________________________

Chemistry 10-19-12 Chemical Formulas with Polyatomic Ions

Posted on by

CHEMISTRY: Great job today! Do you understand better now? Remember – baby steps, first binary ionic compounds, and now, formulas with polyatomic ions. Begin learning them now! And practice, practice, practice!!

Speaking of practice – did you get the homework for this weekend? Two things: first, finish #2 – 8 at the end of chapter 7. Second thing, do the online Chemical Formula & Names Practice: Go to http://www.sciencegeek.net and …

  • Click on Chemistry Review and scroll down to Unit 4
  • Practice each of these three activities on writing and naming chemical formulas: Writing Compound Formulas #1, Binary Covalent Nomenclature, and Writing Compound Form. #2

Last thing, click here for a copy of the Hints for Naming Chemical Formulas Flow Chart. And have a great weekend!!


flickr photo by skycaptaintwo

__________________________________________________

Physics 10-19-12 Forces & Newton’s Law of Inertia

Posted on by

PHYSICS: Great first day of chapter 4! So what’s your theory about the cause of motion? And remind me again why didn’t that pen go flying across the room instead of dropping into the bottle? I love Newton’s first law – the law of inertia! Where else do you see it in action in your world?

So, let’s play with this concept on Monday. Can you use what you know about mass and inertia to find the mass of an unknown object? I know you can! πŸ™‚

Physics: ACT 10-18-12 Science Reasoning Overview, Pt. 2

Posted on by

PHYSICS: Are you ready to start making your own luck? Good luck as you CONTINUE practicing for the ACT. You know, even if you aren’t ever going to take it again, the skills you are developing in critical thinking, making inferences, comparing viewpoints, etc., will all be so very helpful in college, and in life!!

Here’s the second part of the overview of the Science Reasoning section of the ACT that we did on Thursday. Practice, practice, practice!!!

_________________________________________________

Hon Chemistry 10-18-12 Moles to Mass to Molecules

Posted on by

HON CHEMISTRY: Awesome job today using chemical formulas as tools! So, it turns out there are tons of ways that you can use a chemical formula. Like finding molar mass, moles, and molecules! Did it all sound familiar to you – like we were repeating yesterday’s lecture? Here’s the lecture from today.

P. S. Did you realize how super important it’s going to be for you to be able to correctly write chemical formulas (and memorize all that formula stuff)?!? Help session tomorrow morning at 7:15ish A.M.

____________________________________________

Chemistry 10-18-12 Naming Binary Ionic Compounds

Posted on by

CHEMISTRY: Great job today learning to name binary ionic compounds! Tomorrow let crank it up a notch and write their formulas, and then do the same thing all over again for binary molecular compounds!

Remember, the secret for the next few days is DON’T GET BEHIND! Keep up with me and practice, practice, practice!

____________________________________________

PHYSICS 10-17-12 ACT Science Reasoning Overview, Pt. 1

Posted on by

PHYSICS: Your favorite thing to do, right? Wow! I’m sure I don’t have to remind you of all there that’s involved in getting ready for one test!

The good news? The ACT is so very do-able! All the answers are there, you just have to use what you know how to do to find them, and that takes practice, practice, practice. Do you have a better grasp of the skills that you’ll need and techniques you can use to be successful? Try it out tonight, and then let’s practice using them tomorrow in class! Fun times!!! πŸ™‚


Image source testprep.about.com

Hon Chemistry 10-17-12 Moles, Molar Mass & Avogadro’s Number

Posted on by

HON CHEMISTRY: Yep, I did it again! Put new batteries in the mic, but forgot to turn it on! So….. a blast from the past, an old lecture on moles, molar mass, and Avogadro’s number.

You caught on super fast today! Remember, it’s all in terms of one mole. The mass of one mole, the molar mass, is the average atomic mass of the element in grams (periodic table). And the number of atoms in one mole is …. well you know that. Speaking of moles, isn’t he cute? Well, beauty being in the eye of the beholder and all. Hmmmm………


Image source blog.ibts.eu/wp-content/uploads/2009/02/mole2.jpg