Which describes the relationship between a monomer and a polymer? a monomer is a type of polymer made of only one element. a collection of monomers combines to form a polymer. a substitution reaction changes a monomer into a polymer. a monomer is a type of polymer that forms from carbon chains.

Iknow #2 is d. i just need to know why

Answer asap need by wednesday morning calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 best answer will be brainliest

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.