Rimma Likover Homework 2

Rimma Likover Homework 2 - CHM 101 Homework 2 (Ch 2,...

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CHM 101 Homework 2 (Ch 2, 3.8-3.10) 1. What is the numerical meaning of each of the following? a. kilogram- 1000 grams b. centimeter- 1/100 of a meter c. microliter- 1/1,000,000 of a meter d. millimeter- 1/1000 of a meter e. deciliter- 1/10 of a liter 2. How many significant figures are in each of the following numbers? a. 503 three b. 0.007 one c. 4200 two d. 3.0030 five e. 100.00 five f. 8.00 x 10 2 three 3. Express each of the following numbers in exponential notation: a. 2,900,000 2.9*10 6 b. 0.587 5.87*10 -1 c. 0.00840 8.40*10 -3 d. 0.0000055 5.5*10 -6 4. Solve the following problems, stating answers to the proper number of significant figures: a. 15.2 – 2.75 + 15.67 = 28.1 b. (2.25 x 10 3 )(4.80 x 10 4 ) = 1.08*10 8 c. (452*6.253)/(14.3 – 10.9) = 830 d. 10.4 + 3.75(1.5 x 10 4 ) = 5.6*10 4 5. Solve each equation for the variable: a. x = (212-32)/1.8 x=100 b. 8.9 g/mL = 40.90 g/x x=0.22 mL
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c. 72 o F = 1.8x + 32 x=22 6. Complete the following conversions a. 42.2 in to cm 42.2 in*(2.54 cm/1 in)= 107 cm b. 42.8 kg to lb 42.8 kg*(2.205 lb/1 kg)= 94.4 lb c. 12 nm to cm 12 nm(1 cm/10,000,000 nm)=
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This note was uploaded on 01/26/2011 for the course CHM 101 taught by Professor Kershisnick during the Spring '10 term at Northern Illinois University.

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Rimma Likover Homework 2 - CHM 101 Homework 2 (Ch 2,...

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