1. Fall 2011 TA: Elizabeth Braun CHEM 1111.110

2.  Elizabeth Braun  ein100020@utdallas.edu  Office Hours: – Wednesday 11:00am-12:00pm – GEM Center

3.  Syllabus  Safety  Lab Set Up  Workshop  Assignment of Drawers

4. 1.Non-zero integer values always count 9,463.721 7 Significant Figures 2. Zeros between non-zero integers always count 109,034.81 8 Significant Figures

5. 3.Leading zeros never count 0.000052 2 Significant Figures 4. Trailing zeros always count in the presence of a decimal point. 0.0708100 6 Significant Figures

6. 5. When using multiplication or division, the final number of significant figures is determined by the measured number with the smallest number of significant digits. Measured Values: 230.1 g, 230.14g, 230 g. The result has 3 Significant Figures

7. 6. When using addition or subtraction the final number of decimal places is determined by the measured value with the smallest number of decimal places. Measured Values: 14.57 mm, 16.021 mm, 15.9 mm The result has 1 significant digit after the decimal

8. 1,984.200 7 Significant Figures 0.002316 4 Significant Figures 1.22300 x 10 -4 6 Significant Figures

9. http://www.youtube.com/watch?v=D_g0U3vx r18&feature=related http://www.youtube.com/watch?v=D_g0U3vx r18&feature=related http://morrisonlabs.com/meniscus.htm

10. 6.62 mL http://morrisonlabs.com/selfcheck662answer.htm

11. 11.5 mL http://morrisonlabs.com/selfcheckansw115ml.htm

12. 52.8 mL

13.  Place Personal Items on Shelf  Keep goggles, notebook, lab handout  Drawer Assignments  Safety Procedures  Equipment Check-in  Demonstrations