Define crystaline polymer and amorphous polymer .give two example of each polymer.

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

What is the measured amount of a product obtained from a chemical reaction?