Daily Archives: January 11, 2023

Chemistry 1-11-23 Molecular Formulas

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CHEMISTRY: Hey guys! Awesome job with empirical formulas, and now you’ve conquered writing molecular formulas! Here’s the lecture from Wednesday. It’s just like writing empirical formulas but with a twist at the end!

HW UPDATE: All the rest of the homework that was for Tuesday is now due Friday. The homework that is on the syllabus for Thursday (the five extra problems) is changed for now and will be due next week.

Have you started preparing for the test? It will be over ALL of chapter – plus the small bit from chapter 3. Be sure and checked out the Stuff to Know sheet for all of chapter 7 under the Test Info tab!


flickr photo by Sebastian Mary

Physics 1-11-23 Collisions Problems Review 2

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PHYSICS: Great job with some of the more advanced momentum and energy problems! Here’s a look at the student in the middle of a frozen pond, bird on the wire, car crash with coefficient of friction, and the billiard balls.

Ready for the test? Take another look at some of the concepts!


Photo by Jenny Salita on Unsplash

Hon Chemistry 1-11-23 Double Replacement & Combustion Reactions

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HON CHEMISTRY: We had to go fast, but do you realize what we did? We finished all 17 types of reactions today! We’ll practice them tomorrow since we had to go so fast today.

Careful when you work with any of these! For all single replacement reactions and reactions involving forming or decomposing oxide, be sure and refer to the Activity Series. Yes, you do get to memorize the Activity Series for the test – for the big test, not for the coming up quiz!

Are you working on memorizing all 17 types of reactions?! But don’t just memorize them. Make sure you can apply them as well. When you start to work any equation, first determine what type of reaction it is, then figure out what rule applies and follow it to determine the products. I believe in you! You can do it!! (and yes, I realize I am repeating myself, but I do and you can!)