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Worksheet 1 (Chapter 1) Chemistry 100 Name 1. (1) In what household product are you most likely to find the antiseptic triclosan? 2. (1) To test a hypothesis, a scientist: a. writes down a theory. b. thinks up a law. c. does more experiments. d. has a cup of coffee. 3. (2) A marathon is 26.22 miles long. How many meters is this? (1.00 mile = 1.609 kilometers; 1000 meters = 1.00 kilometers) 4. (3) The swimming pool at the University contains approximately 180,000 gallons of water. How many liters of water is this? (1.00 gallon = 3.785 liters) If the density of water is 1.00 kilogram per liter. What is the weight of the water in kilograms and pounds? (1.00 kilogram = 2.205 pounds) Worksheet 2 (Chapter 1) Chemistry 100 Name Answer the following by searching pages at: www.cdc.gov www.epa.gov www.fda.gov www.nih.gov 1. (2) Does antibacterial soap containing triclosan work any better than regular soap at preventing bacterial infections? Give the link where you found your answer. 2. (2) Does the use of triclosan in antibacterial soap lead to resistant bacteria? Give the link where you found your answer. Worksheet 3 Chemistry 100 (Appendix A and B) Name 1. (1) Which of the two, scientific law or scientific theory, is based only on scientific observations? 2. (2) Give two reasons why drug companies are reluctant to bring new antibiotic drugs to market? 3. (3) How many significant figures are in each of the following numbers. a. 10.345 b. 0.0802 d. 3 fish 4. (3) For each of the following, give the correct answer with the proper number of significant figures. a. 1.2 + 88.62 + 0.243 = € b. 12 = 16.2 × 0.251 c. 22.20 + 1.234 = 11 5. (2) For each of the following pairs, circle the larger quantity. € a. 100 cm3 or 10 µL b. 1 µg or 10 ng 6. (2) How many µg are there in 28.3 kg? 7. (2) The wavelength of yellow light is about 590 nm. How long is this in cm? 8. (1) A student extracts 0.0033 grams of limonene from orange peel. What is the mass of limonene in milligrams?
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