Classify the following items based on the type of polymer they are made from: raincoats and leather shoes. all of these are made from synthetic polymers. leather shoes are made of natural polymers; raincoats are made of synthetic polymers. leather shoes are made of synthetic polymers; whereas raincoats are made of natural polymers.

Ineed to know why d is the correct answer asap

What is thought to have caused the mass extinction at the end of the cretaceous period?

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h, o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.