Hon Chemistry 11-14-11 Dalton vs. Modern Atomic Theory

HON CHEMISTRY – Hey guys, here’s the lecture from Monday on the introduction to atomic theory. Isn’t God awesome to give us minds to understand the world around us – even the parts we can’t see. Good job with beginning to compare and contrast Dalton’s Atomic Theory and the Modern Atomic Theory. Are you surprised at how close they are? Make sure you can give examples to apply what you learned about the three laws we discussed today.

By the way – how did you like playing alchemist today? Did we really turn the copper penny to gold? Here’s a hint, was there evidence of a chemical change?

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Chemistry 11-14-11 Percent Composition

CHEMISTRY: Great job today… although, it was kind of weird watching you chew gum in class! Double check your calculations, sig figs, etc. Remember you are finding the percent of SUGAR in gum, so that means the mass of what goes on top? Lab reports are due Monday.

BTW – I think you’ll find that percent composition problems are really easy to catch on to. Make sure, though, you can write chemical formulas (I won’t give them to you!) and that you’ve memorized the formulas for acids and those common substances from #58, so that you’ll have something to find the percent composition of. Don’t stop practicing those as well!

flickr photo by Τϊζζ¥