Wednesday, September 8, 2010

Sig. Figs., Scientific Notation, & Density

Tuesday, September 7, 2010
Today in chemistry, we again braved the confusing world of significant figures. We learned new rules for adding them together, multiplying them, subtracting them, and how could we forget dividing them? Then, after that we learned how to put numbers into scientific notation form. Many others, including myself, were very confused with this process! Mrs. M reminded us:

Just remember when zeros are not significant:
0.00367  these are place holders
400   there is no decimal point so the zeros are not significant

Ms. Mandarino reminded us before we left that the homework was number 2 on pages 5 and 6 and that we will being doing number 1 on page 6 tomorrow in class. She also reminded us that our formal lab write ups are due tomorrow and if you are not turning it in through google doc, you need to bring it in printed out. The ol’ fashion way!

Mike B.

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