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Moles and Percent Comp by Mass – What did we do in class?

What did we do today?  What’s coming up? Friday Bubble Gum Lab, or finding the percent composition by mass of sugar in bubble gum.  You get a piece of gum, and you mass it on the scale.  Then…

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Chem Tutoring (plus other classes too)

The National Honor Society has generously offered to provide you with some chemistry tutoring.  They actually tutor in all subjects, and they are the kids that can help you learn the chem. Some of the kids on the…

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The Periodic Table in the Stairs – Retro Video Inside!

I cannot tell you how proud I am of all of my former students.  The work they did, the trust they put into me when I asked them to believe that this would be good, and it is. …

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Penny Density Lab Concepts

So, you did the lab, but are not quite sure what to make of this.  Here goes, read this all, and hopefully it contains all the answers you seek (grasshopper).  Anyone get that reference? The point to the…

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Temperature Lab Thoughts

So, you did the lab, and I graded it, but here are some things that you all should be thinking about.  All percent error calculations must have a sign.  A positive sign means your measure is greater than…

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Welcome To Our Class

Hello, my name is Charlie Arbuiso, and I’ll be your chemistry teacher.     This website is full of stuff, like… The Class CALENDAR Your Homework Assignments (which you better do) Your Lab Reports (which you better do…

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Classroom Seating

You can sit wherever you want at the start of the year, but please don’t move around until I learn your names.  If you need to sit in the front, do that.  If you can’t find a seat…

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Cheaters Cry

I grew up in Queens, which is part of New York City.  We played a lot of games as kids, mostly with a ball, a stick, popsicle sticks, bottle caps and chalk.  We were poor but we had honor. …

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Copying from the internet is cheating.

I read stuff in lab reports that often makes NO sense to me.  Not to some of you either, but at least I know it was junk.  Some of you will be tempted to copy from the google…

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What is Chemistry?

This is the introductory course to matter: what is it, how does it act and react with other matter, and why doesn’t it react sometimes? Regents Chemistry provides you with a practical and useful overview of the elements, the…

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