Heating and cooling curves

Here is data for the heating and cooling curves.  You still must plot your data but you can use this data to better visulize what is happening and answer the questions.

Heating and cooling curve data

Gold Penny Lab Posted in the homework section

New Material Posted

Chapter 2 powerpoint and chromotography lab posted to the right.

Sig fig practice

If you would like some more sig fig practice here is a website that has a worksheet with answers.
http://misterguch.brinkster.net/september2002.pdf I hope this helps.

QUIZ!

Quiz on Friday on Metric system conversions, scientific notation, and significant figures.  Be ready, come see me if you need help!!

Sig figs in a nutshell

Rules for Zeroes

Rule	Examples
Zeros appearing between nonzero digits are significant	40.7 L has three sig figs           87 009 km has five sig figs
Zeros appearing in front of nonzero digits are not significant	0.095 987 m has five sig figs          0.0009 kg has one sig fig
Zeros at the end of a number and to the right of a decimal are significant	85.00 g has four sig figs           9.000 000 000 mm has 10 sig figs
Zeros at the end of a number but to the left of a decimal may or may not be significant. If such a zero has been measured, or is the first estimated digit, it is significant. On the other hand, if the zero has not been measured or estimated but is just a placeholder, it is not significant. A decimal placed after the zeros indicates that they are significant.	2000 m may contain from one to four sig figs, depending on how many zeros are placeholders. For measurements given in this text, assume that 2000 has one sig fig. 2000. m contains four sig figs, indicated by the presence of the decimal point
Scientific notation - All digits expressed before the exponential term are signicant.	5.060 x 10-3 m has four sig figs.          9.00 x 102 g has three sig figs.

Updated Day One Sheet With corrected grading scale

Check resources for the new day one sheet with corrected grading scale.  Please use the new sheet.

Welcome to chemistry! 

This is where you will find copies of assignments, powerpoints, extended learning, and general information.

I look forward to a great year.