Part 2 Significant Figures with Calculations Reading Glassware

Reading Glassware • Identify the glassware if you know it. Then record the readings

Multiplication and Division Sig. Fig. When multiplying and dividing, limit and round to the

Multiplication and Division Sig. Fig. • 2. 105 x 0. 762 = 1. 60401

Question Time 1 Calculate using the appropriate number of sig. fig. • • •

Addition and Subtraction with Sig. Fig. • When adding and subtracting, limit and round

Question Time 2 Add or subtract using the correct number of significant figures •

Slides: 8

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Part 2 Significant Figures with Calculations

Reading Glassware • Identify the glassware if you know it. Then record the readings to the correct sig figs: A B C

Reading Glassware • Identify the glassware if you know it. Then record the readings to the correct sig figs: D E

Multiplication and Division Sig. Fig. When multiplying and dividing, limit and round to the least number of significant figures in any of the numbers involved in the calculation. • 7. 55 x 0. 34 = 2. 567 3 sig fig. 2 sig. fig. • With sig. fig. 2. 6 (2 sig. fig. )

Multiplication and Division Sig. Fig. • 2. 105 x 0. 762 = 1. 60401 4 sig fig. 3 sig. fig. Answer is 1. 60 (3 sig. fig. ) • 2. 4526 8. 4 = 0. 2919761 5 sig. fig 2 sig. fig Answer is 0. 29 (2 sig. fig. )

Question Time 1 Calculate using the appropriate number of sig. fig. • • • 23. 4 x 56 1. 456 x 5 0. 065 x 23. 5 25 60 245. 00 • • • 1300 (1310. 4) 7 (7. 28) 1. 5 (1. 5275) 0. 4 (0. 416667) 49. 0 (49)

Addition and Subtraction with Sig. Fig. • When adding and subtracting, limit and round your answer to the least number of decimal places in any of the numbers involved in the calculation. • 28. 0 + 23. 538 + 25. 68 = 77. 218 (1) (3) (2) • With correct sig fig. 77. 2 (1 place)

Question Time 2 Add or subtract using the correct number of significant figures • • 23. 445 + 14 +34. 6 26. 9 – 19 34. 543 + 12. 56 + 34. 2 45. 5654 – 34. 2 72 (72. 045) 8 (7. 9) 81. 3 (81. 303) 11. 4 (11. 3654)