Chemistry 8-26-11 SI Derived Units

CHEMISTRY – So you thought Goodman Road was getting crowded! How’s this for a “high density” city? Here’s the lecture from Friday on derived SI units. 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. I think you’ve done a lot of this already, but make sure you understand the conceptual side of density as well!

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. And finally, 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 in a couple of days. You’ll just have to wait! 🙂

flickr photo by chromogenic

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10 thoughts on “Chemistry 8-26-11 SI Derived Units

  1. Hey ms. Skinner I was having trouble between the difference in units and quantitys. Could you explain it to me on Monday?

    • Katie – We are a day behind because of the project presentations, so it’s Thursday nights homework. Have a great weekend!!

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