Chemistry 8-26-13 Derived Units & Density Problems

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.

flickr photo by chromogenic

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10 thoughts on “Chemistry 8-26-13 Derived Units & Density Problems

  1. I learned that there are more rules than i thought there would be in measuring solids liquids, and gases. Like significant figures.

  2. At first the density problems were really difficult for me, but as we have practiced them more, I feel comfortable working the problems! In addition, I also am more confident in my work when we have labs!

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