Unit Conversion and Significant Figures

A unit is the frequently arbitrary designation we have given to something to convey a definite magnitude of a physical quantity and every quantity can be expressed in terms of the seven base units that are contained in the international system of units. Hank thinks this is a thrilling subject, and while you may not agree, it is a subject that is very important if you want to be a scientist and communicate with accuracy and precision with other scientists.

You can view the transcript for “Unit Conversion & Significant Figures: Crash Course Chemistry #2” here (opens in new window).

Significant Figures Made Easy

Review of significant figures and their relation to zeros and decimal points. The video also looks at rounding and answer once an arithmetic operation has been applied to numerical values.

You can view the transcript for “Significant Figures – A Fast Review!” here (opens in new window).

Error and Percent Error

When making measurements and calculations in chemistry, it’s important to know how far off we were (error), and also the significance of that error (percent error).

You can view the transcript for “Error and Percent Error” here (opens in new window).