CHEMISTRY: We finally finished the chapter! Did you realize molecules could be that large? And so many of them. But don’t you think polymers are cool? The first vodcast below is the rest of the lecture that you need for polymers. Fast forward to the part where we left off in your class. Some items for contemplation: why are certain plastics recyclable and others not…and what about dishwasher and microwave safe? Hmmmmm…
Below that is what we actually did first in class yesterday – our look at the homework from last night – empirical and molecular formulas. Great stuff to review as you study for the test!
Polymer Lecture – Fast forward to the part that you need:
Image source: http://www.packtech.ca/pb/images/img32161428fffbe41e07.jpg
Empirical and Molecular Formulas HW:
Photo by ThisisEngineering RAEng on Unsplash
Which type of polymers are the most recyclable?
High density polymers are the most recyclable because they melt when they are heated and can be reshaped.
Q: How can you tell that a chemical reaction has occurred?
A: the production of energy as heat or light, color change, formation of a gas, or formation of a precipitate