The following units are common in chemistry problems. If you have trouble with these concepts please see your instructor for help.
|Density:||g/mL or g/cm3||--|
The following prefixes are useful abbreviations when working with very small or very large numbers. You might find it useful to memorize the most common prefixes: M, k, m, and µ.
Examples: One nm (nanometer) is 10-9 m (that's small), and 2 kg is 2000 g (that's about a six-pack of your favorite beverage).
The mole is a fixed number of something.
If you have one mole of fish, you have 6.022x1023 fish (that's a lot of fish).