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Rimma Likover Homework 2

# Rimma Likover Homework 2 - CHM 101 Homework 2(Ch 2 3.8-3.10...

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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? 3. Express each of the following numbers in exponential notation: 4. Solve the following problems, stating answers to the proper number of significant figures: 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)= 1.2*10 -6 d. 0.65 kg to mg 0.65 kg (1000000 mg/1 kg)= 6.5*10 5 mg 7. A personal trainer uses calipers on a client to determine his percent body fat. After taking the necessary measurements, the personal trainer determines that the client’s body contains 11.2% fat by mass (11.2 lb of fat per 100 lb of body mass). If
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