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Metric Conversions 1. The human eye can detect wavelengths of light as short as 0.000037 cm. What is this wavelength in nanometers? A. 370 nm B. 37 nm C. 37000000 nm D. 3.7 x 10-12 nm Convert .0.000037 cm to nanometers Question to help fill out the conversion table: How many centimeters (cm) and a meter (m)? How many nanometers (nm) in a meter (m)? 2. One gallon of gasoline (Volume: 3785 mL) has a mass of 2540 g. What is the density of gasoline/ A. 1.49 g/mL B. 0.671 g/mL C. 1.00 g/mL D. 1.67 g/mL 3. Your calculatorâ€™s answer is read from a(n) __________ display. a. analog b. Calibrated c. Digital d. scaled 4. Which of these is a non metric unit that is often used with SI prefixes? A. Meter B. Liter C. Gram D. ampere 5. What volume does a 1-carat (mass: 0.2 g) diamond occupy? (density = 3.27 g/mL) a. 3.27 mL b. 16 mL c. 0.65 mL d. 0.06 mL 6. The measurement 0.037010 m has how many significant digits? A. 6 B. 5 C. 3 D. 4 7. A fraction equal to 1 that contains both the original unit and its equivalent value in an new unit is called a(n) A. Conversion factor B. Exponential factor C. Pure number D. Derived unit 8. What indicates the precision of an instrument and helps scientists report measurements honestly? A. Unit analysis B. Scientific notation C. Significant digit D. Unit of measurement 9. An instrument that is used to compare an object directly to a scale or that displays the reading using a pointer is called a(n) ________________measurement. A. Analog B. Non-decimal C. Conventional D. Digital 10. The scale of a measuring instrument is ________________, that is, accurately subdivided into measurement units. A. Standardized B. Unitized C. Graduates D. enumerated 11. Which of these would yield a measurement with the greatest precision? A. Oven thermometer B. Pool thermometer C. Oral medical thermometer D. Outdoor weather thermometer 12. __________(T/F) When determining significant digits in multiplication and division problems, the answer cannot contain more significant digits than the measurement with the least number of significant digits. 13. __________(T/F)The number 0.00800 has three significant digits. 14. __________(T/F) The number 0.000980 mL should be expressed as 9.8 x 104mL in scientific notation. 15.___________(T/F) If a scientist is extremely careful and uses precise instruments a perfect measurement can be obtained. 16.___________(T/F) The unit for volume is derived from the SI unit for length (the meter). 17. __________(T/F) When solving problems that involve compound calculations, it is best to round off at each of the intermediate steps. Matching Part 1: Match the letter of the prefix with the appropriate clue by writing the letter in the blank. Answers will be used only once. a. Centi b. Deci c. Kilo d. Mega e. Micro f. Milli g. nano_______18. Hundredth _______19. Million _______20. Tenth _______21. Billionth _______22. Thousandth _______23. thousand Matching Part 2: Match the letter of the power of 10 with the appropriate clue by writing the letter in the blank. Answers will be used only once. a. 106 b. 103 c. 10-1 d. 10-2 e. 10-3 f. 10-6 _______24. c _______25. M _______26. Î¼ _______27. d _______28. k _______29. M Matching Part 3: Match the letter of the description with the appropriate clue by writing the letter in the blank. Answers may be used more than once. A. Accurate but not precise B. Precise but not accurate C. Both accurate and precise D. Neither accurate nor precise ______30. You measure products of a chemical reaction to be 6.15g, 6.16g, and 6.13g. The actual mass is 6.14g. ______31. You measure products of a chemical reaction to be 4.12g, 3.25g, and 4.79g. The actual mass is 2.25g. ______32. You measure products of a chemical reaction to be 1.56g, 1.59g, and 1.60g. The actual mass is 3.62g. Calculations: 33. You measure the mass of a product in a chemical reaction to be 1.87g. Theoretical calculations predict that you should have obtained 1.95g. What is the percent error? 34. Which of these has the greatest number of significant digits: 35620 cars, 2.35m, or 25000mL? 35. Convert 463 kg to mg. Question to help fill out the conversion table: How many grams (g) in a kilogram (k)? How many milligrams (mg) in a gram (g)? 36. Convert 342 mm to dm. Question to help fill out the conversion table: How many millimeters (mm) in a meter (m) How many decimeters (dm) in a meter (m) 37. Perform the following operation, observing significant digits: (26.9 cm)(5.0m) 38. Perform the following operation, observing significant digits: 7.491m + 60.2m + 1.00224m 39. Perform the following operation, observing significant digits: 16.1mL -6.81mL - 0.00032mL 40. Find the volume in mL occupied by 454g of copper, which has a density of 8.92g/mL.