CHEM 1F92 Lecture Notes - Lecture 2: Significant Figures, Decimal Mark

• School: Brock University
• Department: Chemistry
• Course: CHEM 1F92
• Professor: Lydia W.L.Chen

Document Summary

1. 8 guidelines for using significant figures: any digit that is not zero is significant. 3. 9745 = 5 sig figs: zeroes to the far left are not significant. 0. 0008 = 1 sig fig: zeroes to the far right are significant. 3. 040 = 4 sig figs: zeroes between nonzero digits are significant. 606 = 3 sig figs & 40501 = 5 sig figs. If a number is > 1, all zeroes to the right of the decimal point are significant figures. 1 dp 2 dp 1 dp: multiplication and division, the final answer has the same number of significant figures as the original number with the least number of significant figures, example: 2. 8 x 4. 5039 = 13. 2 s. f: when multiple operations are involved, round to the correct number of significant figures at the end of the calculation, example: 5. 578 x [3. 20 0. 257] / 70. 910.