For each of the following, sketch the repeat unit and compute its molecular weight: (a) (b) poly(methyl methacrylate) (c) nylon 6,6 (d) poly (ethylene terephthalate)

The following transition occurs at a molecular level for a substance. what transition corresponds to this change in microscopic structure? the carbon dioxide molecules on the left are in a regular, tightly packed pattern. after heating, it becomes much lower density. a. melting b. boiling c. sublimation d. freezing