Internet chpt 02 measurement5-03

# Internet chpt 02 measurement5-03 - Page of 8 CH M 1120 D r...

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Unformatted text preview: Page of 8 CH M 1120 D r. Adams(8-05) Chap te r 2- I n t e r ne t M E A S U R E M E N T All measurements are relative to a standard. Chemists use the metric system as their common standard. Section 2.2 Scientific Notation Very large and very small numbers are more easily written using powers of 10. This involves using a decimal number followed a power of 10. Scientific Notation 3.92 × 10 5 exponent power of 10 Decimal number 1 to 10 Convert these following numbers to 1,000,000. = 10 6 scientific 100,000. = 10 5 notation. 10,000. = 10 4 .0072 = 7.2 x 10-3 1,000. = 10 3 100. = 10 2 10. = 10 1 101,403. = 1.01403 x 10 5 1. = 10 1 = 10-1 .01 = 10-2 .000014 = 1.4 x 10 5 .001 = 10-3 .0001 = 10-4 Multiplying in scientific notation (pg 37) (a × 10 m )(b × 10 n ) = a . b × 10 (m + n) 1 Page of 8 Finish these problems. (2.0 × 10 3 )(4.5 × 10 5 ) = 9.0 x 10 8 (3.1 × 10-4 )(1.7 × 10 2 ) = 5.27 x 10-2 (4.1 × 10-3 )(3.2 × 10 2 ) = 1.312 x 10-1 Dividing two numbers in scientific notation (pg 38) a × 10 m = a × 10 (m - n) b × 10 n b Finish these problems. 5.0 × 10 3 = 2.5 x 10-1 1.71 × 10-3 = 1540 x 10-8 2.0 × 10-3 = 4.0 x 10-4 2.0 × 10 4 1.11 × 10 5 5.0 × 10 8 Complete Problem 1 pg 36. a. 1.73 x 10 2 b.2.9 x 10-3 c. 1.31982 x 10 5 d 4.01 x 10 -6 e 1.64 x 10-2 Problem 2 pg 37 A 7310.0 b. 000192 c 638000.0 d. 0000836 Problem 3 pg 38 A 2.30 x10 7 B 1.65 x10 2 C 3.84 x10-14 2 Page of 8 D 3.16 x10 2 Problem 4 pg 39 A 2.0 x10 4 B 2.73 x10-10 C 2.01 x10 8 D 9.48 x10 2 2.4 The Metric System-Based on multiples of 10...
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Internet chpt 02 measurement5-03 - Page of 8 CH M 1120 D r...

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