Chemistry 100

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Chemistry

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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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