Units and Unit Conversions
Many aspects of chemistry are quantitative, and you use units to measure these quantities. In many cases, you have to convert from one unit to another. Most people in the United States initially learn the English system of units, but most chemists use the Système international d’unités (the SI system), derived from the older metric system. Unit conversions relate these two systems. Dimensional analysis provides a systematic means to not only perform these conversions but also to work many of the other problems in this book. Dimensional analysis lets the units solve the problem for you.
The Problems You’ll Work On
In this chapter, you work with units and unit conversions in the following ways:
Choosing appropriate units
Interpreting metric prefixes
Converting metric and English units
Solving problems with dimensional analysis
What to Watch Out For
Don’t let common mistakes trip you up; remember the following when working on units and unit conversions:
Always include your units when setting up equations and answering questions.
Set up your problem ...