PHYSICS: Funny thing about words, all this work you thought you’d been doing, was it? Work, I mean? Great intro to chapter 5! I think you’ll do great with the work problems, just remember everything from the last chapter and multiply by d!
Did you get the word – the thLAB is due Thursday.
PHYSICS 11-19-13 Work from Tammy Skinner on Vimeo.
flickr photo by *hb19
CHEMISTRY: Great job today working with empirical and molecular formulas! Don’t you think that doing molecular formulas is just like writing empirical formulas, but with a twist at the end?
By the way, if you’d like some practice or if you have questions – help session TOMORROW morning, 7:15 A.M.
CHEMISTRY 11-18-13 Empirical & Molecular Formula Practice from Tammy Skinner on Vimeo.
CHEMISTRY: So, would you like to be Greg on CSI? I missed you guys on Friday! Here’s the lecture you watched today on calculating empirical and molecular formulas.
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. Simple! π
CHEMISTRY 11-15-13 Empirical & Molecular Formulas from Tammy Skinner on Vimeo.
Image source www.dnr.mo.gov/env/esp/images/prettytesttubes.jpg
HON CHEMISTRY – Hey guys, here’s the lecture from Thursday on how scientists discovered protons and neutrons. You know, in class yesterday and today I just gave you one name to go with each, but do you think these men did all the work by themselves? Why don’t you ask me about that tomorrow?
Make sure you know the name of the scientists, the name of their experiments, be able to draw a diagram of their experiment, and describe how they interpreted the experimental results that led to their discoveries.
Don’t forget about the video clips we watched in class, they’ll help you review the different experiment that the guys like Thompson and Rutherford did. Here’s another one on The Discovery of the Nucleus. And again – do you think there could be anything smaller than protons, neutrons, and electrons? Hmmmmm……
P. S. Did you figure out what was in your atom?
HON CHEMISTRY 11-14-15 Structure of Atom, Pt. 2 from Tammy Skinner on Vimeo.
flickr photo by Here’s Kate
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CHEMISTRY: Great job today… although, it was kind of weird watching you chew gum in class!
Lab reports are due Saturday midnight – to be saved to your Google Dropbox as a PDF. Double check your calculations, sig figs, etc. Remember you are finding the percent of SUGAR in gum, so that means the mass of what goes on top? Show all your data – everything you measured, and everything you calculated. And don’t forget the conclusion!
BTW – I think you’ll find that percent composition problems are really 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 chemical names for common substances so that you’ll have something to find the percent composition of!
CHEMISTRY 11-14-13 Percent Composition from Tammy Skinner on Vimeo.
HON CHEMISTRY: Here’s the lecture from Wednesday on how scientists began to determine the structure of the atom and the existence of subatomic particles – well, the electron anyway. FYI – as we go on, make sure you know the name of the scientists, the name of their experiments, be able to draw a diagram of their experiment, and describe how they interpreted the experimental results that led to their discoveries. Wow, that’s a mouthful! Click here for the video on the Cathode Ray Tube Experiment that Thompson did, and also for a little history on The Discovery of the Electron. Do you think there could be anything smaller? Than an electron, I mean??
By the way – how do you feel about playing scientist tomorrow? How is what you’re going to do similar to the work of early scientists in discovering the structure of the atom? Don’t forget to bring your sock/can atoms with the surprise items inside! Don’t forget that you DO NOT have to cut your sock. Just get a sock that’s really long, and stick a clean, empty can inside it. Well, make sure you put your mystery items (three or more) inside the can first!
HON CHEMISTRY 11-13-13 Structure of the Atom, Pt. 1 from Tammy Skinner on Vimeo.
CHEMISTRY: Great job on the moles of chalk lab! You set a land speed record for finishing a lab, and no hints. Good job!
Here is a review of one of the mole problems. 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 – just make sure that you present your data and calculations like a scientist would!
π
Chemistry 11-13-13 Mole Problems & Moles of Chalk Lab from Tammy Skinner on Vimeo.
HON CHEMISTRY: Pretty impressive little theory that Dalton came up with, huh? Good job making comparisons with the Modern Atomic Theory. In addition, I want you now to be able show a connection between the three laws we discussed today and Dalton’s atomic theory. On to their actual work tomorrow!
HON CHEMISTRY 11-13-13 Structure of the Atom, Pt. 1 from Tammy Skinner on Vimeo.
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PHYSICS: Great job with net vertical force! Super short! More tomorrow.
And I still don’t know what’s so funny about a fish in an elevator??
π
PHYSICS 11-11-13 Net Vertical Forces from Tammy Skinner on Vimeo.
CHEMISTRY: So how many water molecules are in this drop? Here’s the lecture from today on formula mass and then using molar mass and Avogadro’s number as a conversion factor. You did a great job on thinking through the problems! Now go forth and practice them so you don’t forget!
π
CHEMISTRY 11-11-13 Molar Mass, Molecules & Avogadro’s Number from Tammy Skinner on Vimeo.
