Before we run we must walk. Before we conquer chemistry, we must have a firm foundation. Chemistry has a reputation for being hard, but when it comes down to it, general chemistry is simply a series of names and mathematical manipulations. In this unit, we will examine the basic relationships necessary to convert one unit into another and present some definitions and concepts to aid you in your understanding. So sit back and read a few pages. I’m sure that you will be rewarded with a star for your efforts.