Hon Chemistry 12-3-21 Describing Chemical Reactions

HON CHEMISTRY: So tell me again – how do you know if a chemical reaction has occurred? And how could you record that for someone? Here’s the lecture from Friday on writing balanced chemical equations.

Here’s another hint – not necessarily a good idea to try to make your own blue flame thrower! Click here to watch the Periodic Videos Blue Flame Thrower Video

Photo credit: Periodic Videos Blue Flame Thrower Video

Physics 12-3-21 Power & the Horsepower Lab

PHYSICS: So how many horsepower do you have? Hmmmm…..

Here’s the super short lecture from today on power – beginning with #46 from last night’s homework, and then a quick look at the power lab. Now go forth and conquer the power problems!

Need answers? Here are the Chapter 5 Review Worksheet 2 Answers:
3.) 1090 J
4.) 1350 J
5.) 79%
6.) 917 W
8.) 9.57 kW
12.) 420 N
14.) 1300 J
18a.) -125 N
18b.) -2190 J
18c.) 0.360
19.) 4380 J

flickr photo by Thomas Hawk

Chemistry 12-3-21 Using Chemical Formulas

CHEMISTRY: So the little mole turns out to be a pretty big deal – and a very handy tool!!

Awesome job today! We had a mic crash, so the vodcast posted here is from another class. Here’s discussion on formula mass and molar mass, and then using molar mass and Avogadro’s number as a conversion factor. You’ve got a couple of great tools – so now think through the problems and go forth and conquer!! Be sure and practice them so you don’t forget!

Photo by ahmad kanbar on Unsplash