1. Chemistry 102A/E Dr. Christine Yerkes 207 Chem Annex 333-6353 cyerkes@illinois.edu Mon. and Wed. 11:00 - 12:00 Tues. and Thurs. 2:00 - 3:00 or by appointment

2. Chemistry, 7th ed., Zumdahl Quiz sections begin: Wed., Aug. 27 Required Texts:

3. On-line Homework: 75 pts. Exam Correction 10 pts. Quiz score:150 pts. Participation 15 pts. Hour Exams (3 x 150)450 pts. Final Exam300 pts. 1000 pts. No make-up quizzes or exams Grading Policy:

4. Grades 97-100% (970 - 1000) = A+ 93 - 96% (930 - 969) = A 90 - 92% (900 - 929) = A- 87 - 89% (870 - 899) = B+ 83 - 86% (830 - 869) = B 80 - 82% (800 - 829) = B- etc., etc., etc. 1000 points total

5. weekly quizzes - material from Lecture and Quiz section each quiz worth 15 points -keep 10 highest Quiz scores: 175 points TA evaluation - 15 points After H.E. I and II – correct errors 10 points

6. On-line Homework: 13 Homework assignments on Lon-Capa due dates in the on-line Syllabus and calendar credit for all problems completed by deadline normalized to 75 points

7. Course Homepage http:// www.chem.uiuc.edu Lon-Capa = net i.d. Password = AD password Chem 102A/E Course Web Sites homepage

8. Chemistry understand nature atomic or molecular level observation hypothesis prediction experiment

9. observation measurement of physical phenomena number units charge of an electron - coulombs00000000000000000160 Scientific Notation 0.

10. Scientific Notation 0.000000000000000000160 number x 10 n 1-9 integer 1.60x10=1.60 1.60 x 10 1 =16.0 1.60 x 10 -1 =0.160 1.60 x 10 -19 1.60 or 1.6 or 1.600 Significant figures 0

11. uncertainty in last digit 5.08 x 10 4 5.0800 x 10 4 3 sig.fig. 5.07 50,700 50,900 5 sig.fig 5.0799 50,79950,801 1. All non zero digits are significant 2. Zeros between digits are significant 3. Zeros to left of digits are not significant 4.Zeros to right of digits and decimals are significant 5.095.0801

12. Significant figures (47.03) x(0.00540)= sig.fig (5.40 x 10 -3 ) sig.fig 0.253962 sig.fig =0.254 rounding  5 round up < 5round down round at end of calculations 45.6 0.369 + 83.51 1 decimal place 3 decimal places 2 decimal places limiting 129.47900129.5 43 3 limiting

13. Significant figures 732.11 + 6.3 760.00 = do addition (subtraction) first 732.11+ 6.3 = 2 decimal1 decimal 738.41(738.4) do multiplication (division) last 738.4 760.00 4 sig fig 5 sig fig 738.41 760.00 = 0.971592105 4 sig fig 0.9716

14. unitsSI mass kilogramkg lengthmeterm timeseconds temperaturekelvinK amountmole mol T K =TCTC + 273.15 mole =6.02 x 10 23

15. unitsSI masskilogramkg lengthmeterm timeseconds temperaturekelvinK amountmole mol volume= length 3 1 liter (L) 1 cm 3 = (1 dm) 3 = (10 cm) 3 = 1000 cm 3 = 1 mL

16. Dimensional Analysis 1.Start with data given, including units. 2.Determine the units in the answer 3. Find conversion factors What is the mass, in grams, of 1.00 gallon of water? The density of water is 1 g/mL. 1.00 gal= g 1 gal = 4 qt 4 qts 1 gal 1.057 qt = 1 L 1 L 1.057 qt 1 g = 1 mL 1000 mL = 1 L 1000 mL 1 L 1 g 1 mL 3  3780 g 3.78 x 10 3 g 3784.295