SC155

1. SC155 Instructor: Denise Stiglich

2. Ice Breaker • Career aspirations • Location • How familiar are you with chemistry?

3. Important Navigation • Course Home • Syllabus • Doc Sharing • Units • 10 units • Discussion Board • Due Dates • Week goes Wed-Tues • ET zone • Expectations of students • Make main post and then post throughout the week. • Substantive post • No set number, need to be active • Grading rubrics for projects

4. Question • Is this your first course at Kaplan?

5. Seminar Protocol • Please be respectful of all other students, their questions, and their answers. • If you have a question, feel free to ask anytime. However, in some cases I will stop and answer all questions at once. Do not worry; I will get to your question, so you do not need to repeat it. • Sometimes I will type *open*. This means the floor is open for discussion. • Please do not interject “I agree” and “Good point”. This clutters the chat. We will assume that unless otherwise noted everyone agrees a point is valid. • Don’t worry about typos; be as clear and concise as possible with your posts. Please refrain from using smiley’s and slang. Use proper English. • Please do not start side conversations. Stay on topic.

6. Question • How many elements are there?

8. Seminar Questions • Think about the objects in the following list, and, answering as if you were an Ancient Greek student, determine which of the four elements make up that object (note: you may choose more than one): • A piece of gold • A drop of honey • Fog • Mud • Coal • Bread • Another object of your own choosing—come prepared to discuss it

9. Living creatures gave the Greeks a little bit of trouble though—the Greeks could never agree on which elements made up things that were alive. What would you have said, if you were alive 2,400 years ago? • Why might living things have been so difficult to classify using this four-element system? • What about lightning, another item that the Greeks found very confusing? • How might you classify it, using this system? • Most importantly, what are some of the downfalls of such a four-element system?

10. Significant Figures • Atlantic-Pacific Method • Decimal Present • Start counting with first non-zero on “Pacific” side. (Left) • Count every number as move right • Decimal Absent • Start counting with first non-zero on “Atlantic side. (Right) • Count every number as move left Sample problems: 0.0420 cm 0.020 ml 5.320 in. 10 lb.

11. Significant Figures and Mathematical Calculations Addition and Subtraction Multiplication and Division

12. Practice Problems • How many significant figures do the following numbers have? • 1243 • 0.023 • 890 • 91010 • 9010.0 • 3.4 x 104 • 9.0 x 10-3

13. Solve the following problems. Make sure to use the correct number of sig figs. • 1) 334.54 grams + 198 grams = ___________________ • 2) 34.1 grams / 1.1 mL = ___________________ • 3) 2.11 x 103 joules / 34 seconds = ___________________ • 4) 0.0010 meters – 0.11 m = ___________________ • 5) 349 cm + 1.10 cm + 100 cm = ___________________ • 6) 450 meters / 114 seconds = ___________________ • 7) 298.01 kilograms + 34.112 kilograms = __________________ • 8) 84 m/s x 31.221 s = ___________________

14. Solve the following problems. Make sure to use the correct number of sig figs. • 1) 334.54 grams + 198 grams = 533 g (from 532.54 g) • 2) 34.1 grams / 1.1 mL = ___________________ • 3) 2.11 x 103 joules / 34 seconds = ___________________ • 4) 0.0010 meters – 0.11 m = ___________________ • 5) 349 cm + 1.10 cm + 100 cm = ___________________ • 6) 450 meters / 114 seconds = ___________________ • 7) 298.01 kilograms + 34.112 kilograms = __________________ • 8) 84 m/s x 31.221 s = ___________________

15. Solve the following problems. Make sure to use the correct number of sig figs. • 1) 334.54 grams + 198 grams = 533 g (from 532.54 g) • 2) 34.1 grams / 1.1 mL = 31 g/mL • 3) 2.11 x 103 joules / 34 seconds = ___________________ • 4) 0.0010 meters – 0.11 m = ___________________ • 5) 349 cm + 1.10 cm + 100 cm = ___________________ • 6) 450 meters / 114 seconds = ___________________ • 7) 298.01 kilograms + 34.112 kilograms = __________________ • 8) 84 m/s x 31.221 s = ___________________

16. Solve the following problems. Make sure to use the correct number of sig figs. • 1) 334.54 grams + 198 grams = 533 g (from 532.54 g) • 2) 34.1 grams / 1.1 mL = 31 g/mL • 3) 2.11 x 103 joules / 34 seconds = 62 J/s (from 62.0588 J/s) • 4) 0.0010 meters – 0.11 m = ___________________ • 5) 349 cm + 1.10 cm + 100 cm = ___________________ • 6) 450 meters / 114 seconds = ___________________ • 7) 298.01 kilograms + 34.112 kilograms = __________________ • 8) 84 m/s x 31.221 s = ___________________

17. Solve the following problems. Make sure to use the correct number of sig figs. • 1) 334.54 grams + 198 grams = 533 g (from 532.54 g) • 2) 34.1 grams / 1.1 mL = 31 g/mL • 3) 2.11 x 103 joules / 34 seconds = 62 J/s (from 62.0588 J/s) • 4) 0.0010 meters – 0.11 m = -0.11 m (from -0.109 m) • 5) 349 cm + 1.10 cm + 100 cm = ___________________ • 6) 450 meters / 114 seconds = ___________________ • 7) 298.01 kilograms + 34.112 kilograms = __________________ • 8) 84 m/s x 31.221 s = ___________________

18. Solve the following problems. Make sure to use the correct number of sig figs. • 1) 334.54 grams + 198 grams = 533 g (from 532.54 g) • 2) 34.1 grams / 1.1 mL = 31 g/mL • 3) 2.11 x 103 joules / 34 seconds = 62 J/s (from 62.0588 J/s) • 4) 0.0010 meters – 0.11 m = -0.11 m (from -0.109 m) • 5) 349 cm + 1.10 cm + 100 cm = 500 cm (from 450.1 cm) • 6) 450 meters / 114 seconds = ___________________ • 7) 298.01 kilograms + 34.112 kilograms = __________________ • 8) 84 m/s x 31.221 s = ___________________

19. Solve the following problems. Make sure to use the correct number of sig figs. • 1) 334.54 grams + 198 grams = 533 g (from 532.54 g) • 2) 34.1 grams / 1.1 mL = 31 g/mL • 3) 2.11 x 103 joules / 34 seconds = 62 J/s (from 62.0588 J/s) • 4) 0.0010 meters – 0.11 m = -0.11 m (from -0.109 m) • 5) 349 cm + 1.10 cm + 100 cm = 500 cm (from 450.1 cm) • 6) 450 meters / 114 seconds = 3.9 m/s (from 3.9474 m/s) • 7) 298.01 kilograms + 34.112 kilograms = __________________ • 8) 84 m/s x 31.221 s = ___________________

20. Solve the following problems. Make sure to use the correct number of sig figs. • 1) 334.54 grams + 198 grams = 533 g (from 532.54 g) • 2) 34.1 grams / 1.1 mL = 31 g/mL • 3) 2.11 x 103 joules / 34 seconds = 62 J/s (from 62.0588 J/s) • 4) 0.0010 meters – 0.11 m = -0.11 m (from -0.109 m) • 5) 349 cm + 1.10 cm + 100 cm = 500 cm (from 450.1 cm) • 6) 450 meters / 114 seconds = 3.9 m/s (from 3.9474 m/s) • 7) 298.01 kilograms + 34.112 kilograms = 332.12 kg (from 332.122 kg) • 8) 84 m/s x 31.221 s = ___________________

21. Solve the following problems. Make sure to use the correct number of sig figs. • 1) 334.54 grams + 198 grams = 533 g (from 532.54 g) • 2) 34.1 grams / 1.1 mL = 31 g/mL • 3) 2.11 x 103 joules / 34 seconds = 62 J/s (from 62.0588 J/s) • 4) 0.0010 meters – 0.11 m = -0.11 m (from -0.109 m) • 5) 349 cm + 1.10 cm + 100 cm = 500 cm (from 450.1 cm) • 6) 450 meters / 114 seconds = 3.9 m/s (from 3.9474 m/s) • 7) 298.01 kilograms + 34.112 kilograms = 332.12 kg (from 332.122 kg) • 8) 84 m/s x 31.221 s = 2600 m (from 2622.564 m)

22. Dimensional Analysis- Conversion Factor