Monthly Archives: November 2018

Hon Chemistry 11-6-18 Empirical & Molecular Formulas

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HON CHEMISTRY: Awesome job today!! You just about figured out how to find empirical formulas and molecular formulas all by yourself! I love the way you were able to think through what you knew and what you needed to find a solution!

Be sure and practice – if you don’t it’ll get all turned around and you’ll end up leaving off an important step. 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.

Are you starting to catch on to the steps? It will be good for you to memorize them, but would it not be just tons better to understand why you need each step – backwards and forwards, so then you wouldn’t need to memorize them at all!

And then, also remember what molecular formulas are – just a multiple of the empirical formula. Keep that concept in mind, and you’ll have no problem remembering to divide the molecular formula mass by the empirical formula mass to find X! Easy peasy! πŸ™‚


flickr photo by Darwin Bell

Physics 11-6-18 Friction Problems & Friction on Inclines

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PHYSICS: Who knew snow skiing could be so complicated! Well…friction problems on an incline anyway. Here’s our discussion of friction problems on an incline.

Back to the problems – remember, drawing the diagram is super, super important. Label all the forces and apply the concepts you know about net forces and resultant forces – let it tell you a story. πŸ™‚

Here is some info you might find helpful:
Wed night answers


flickr photo by t i g

Hon Chemistry 11-2-18 Percent Composition

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HON CHEMISTRY: Great job today! Way to apply chemistry to your everyday life!!

I think you’ll find that percent composition problems are super easy to catch on to. First, though, be sure you know which “type” of percent composition you’re trying to fine. Also make sure 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 and formulas for common substances. It’s just plug and play from there! πŸ™‚


flickr photo by ΀ϊ΢΢Β₯

Chemistry 11-1-18 Chemical Formulas Practice Homework

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CHEMISTRY: Did you get the homework change yesterday? Your only written homework is to do the first two Chemical Formula Practice from sciencegeek.net that are listed on the bottom of the syllabus. Be sure and check the syllabus for how you are supposed to turn it in! Also a good idea to check the syllabus for the web post comment topic!

BIG UPDATE!! The Chap. 7 Memorization Pre-Test Quiz is moved to Thursday, November 8. The following will be on the quiz – monatomic ions, polyatomic ions, prefixes, and acids, AND Writing & Naming Chemical Formulas

Need help with chemical formulas? Help session this Tuesday morning, 7:20ish A.M.

Great job today writing and reading code! Do you think chemical formulas are kind of like code? And if you make one tiny mistake…..???

Physics 11-1-18 Friction & Normal Force

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PHYSICS: Why don’t things that are moving just keep moving? Here is our intro on friction from today. Homework UPDATE for Thursday night: Pg. 146 – 149: 30, 32, 35, 37 – 39, 45, 47, 49

Remember a few key things. One of the most important – net forces produce acceleration.

You can find Ff a couple of different ways – it’ll be part of a net force equation and can be found from the coefficient of friction equation. If and ONLY if your object is moving at a constant velocity, Ff will equal Fa. Fn is only sometimes equal to Fw. If your object is pulled at any angle (or pushed), Fn will be a part of Fnet in the vertical direction.

Whew! πŸ™‚


flickr photo by kbaird

Hon Chemistry 11-1-18 Moles of Chalk

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CHEMISTRY: All kinds of ways to find the moles of chalk in your name! You set a land speed record for finishing a lab. Good job!

The book homework has changed for tonight and tomorrow night. See below if you didn’t get it in class. Also, the thLAB: Calculating MOles is to be written up as a formal lab report – pictures, etc. Be sure and change the formula for sucrose to the formula that is written in the notes on our syllabus.

Thursday HW Update:
Pg. 246 – 250: 28, 30 – 31, 42 AND do 31 and 42 AGAIN but change the directions to: β€œFind the number of molecules in each of the following.” (Do b and c only on all)

Friday HW Update:
Pg. 238: Blue Practice 1 – 3 (Middle of page)