An emulsion is a mixture of two liquids. What gives it the special propterty is that one of the liquids exists in the form of very tiny droplets in the other one. An example of this is a vinegar and oil salad dressing.

8/03/98 - Polyvinylchloride

Like a lot of the big molecules that are out there, polyvinylchloride (PVC) is modular. That means that it is a long repeating string of smaller parts. PVC is used in water pipes and other plumbing applications.

8/04/98 - Avogadro's Number

Lets say you are a scientist, and you're trying to figure out how many atoms are in a solution. Pretty hard job, considering thousands of atoms fit on a head of a pin. So how do you do it? Avogadro's number, or in other words, mole. A mole is 6.023 E 23 atoms. For example, a mole (mol) of aluminum is 27.0 grams.

8/05/98 - Reactions

A chemical reaction is very simply a material changing from a beginning mass to a resulting substance. It does not necessarily mean that new elements are made. All chemical reactions are describable by chemical equations.

8/06/98 - Top Five Signs You Know You're Having A Chemical Reaction

1. Bubbles of gas begin showing up.
2. The color changes.
3. The temperature changes.
4. Light is produced.
5. Water or other condensation forms.

8/07/98 - Extensive Properties

No, they are not long winded proofs that a chemical is green. Extensive properties are those that change when the amount of matter or substance changes, such as mass, volume, length and so forth.

8/08/98 - Intensive Properties

Intensive properties are those that do not change as the amount of the substance changes. Examples of these properties are color, pressure, density etc.