What might cause the percent yield of sodium chloride to be less than 100%? how about when it is more than 100%?

Which type of orbits are found in the principal energy level n = 2 a - s b - s, f c - s, d d - s, p e - s, p, d

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.

Identify the electromagnets with poles that are reversed from the electromagnet shown above