CHEMISTRY – So you think Goodman Road is getting crowded? How’s this for a “high density” city? Great job on the density problems today! Remember, in chemistry we use math as a tool, therefore we might work problems a little differently in chemistry than you do in your math class.

When working these problems, don’t forget to follow the problem solving steps we discussed today:

**Analyze**– write down what you’re given and what you’re looking for**Plan**– write a formula where you isolate the unknown on one side by itself**Compute**– plug in your data, numbers and units; then cancel the units, and if they cancel correctly, go on to the calculator. Be sure and give your answer what the correct units.**Evaluate**– does your answer make sense, have you used the correct units, do you have the correct sig figs?

Wait – scratch that last thing, we’ll do sig figs tomorrow. Speaking of tomorrow, any questions about the thLAB: SI Scavenger Hunt? Bring your questions tomorrow and I’ll be glad to help!

CHEMISTRY 9-26-13 Derived Units & Density from Tammy Skinner on Vimeo.