Hydrogen can be obtained economically as a bi-product in the electrolysis of

Which best explains why an iceberg floats?

Which other elements contain the same number of outer electrons as sodium

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.