When a solid compound is formed from chemicals that are in a solution, it is called a precipitate. true or false.?

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.

Fossil fuels are organic compounds that are made from

Areaction in which products can react to re-form reactants is