Humboldt State University ® Department of Chemistry

Richard A. Paselk

Chem 109 - General Chemistry - Spring 2011

Lecture Notes 2: 21 January


Why Chemistry is often considered the "central science."

What is Chemistry?

Chemistry is the study of matter and its transformations.

More specifically, chemistry is the scientific study of matter. So what do we mean by science? Two common "definitions" for Science:

The remaining steps are noted below:


Significant figures:

For measurements we want to be sure we convey the precision (repeatability) of our measurements using significant figures. [covered in lab & problem set] You should note a couple of aspects of significant figures:



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© R A Paselk

Last modified 28 January 2011