Is the movement of particles from an area of higher concentration to an area of lower concentration

What are the percent by mass of copper in penny lab

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Which substance has non polar covalent bonds