This Document Contains Chapters 1 to 2 Chapter 1 The Chemical World True/False Questions 1. Chemicals make up everything around you, including your own body. Answer: True 2. Chemists study the properties of substances and the particles that compose those substances. Answer: True 3. When a sealed can of soda pop is opened, the carbon dioxide gas fizzes out because the pressure is released. Answer: True 4. The properties of water do not depend on how the atoms are bonded together in the molecule. Answer: False 5. Both carbon dioxide molecules and water molecules consist of three atoms bonded together in a straight line. Answer: False 6. Molecules are responsible for scattering light which causes the colors of the sunset. Answer: True 7. Atoms and molecules determine how matter behaves. Answer: True 8. Chemistry is the science that seeks to understand what matter does by studying living organisms. Answer: False 9. The scientific method emphasizes reason as the way to understand the world. Answer: False 10. A hypothesis can never be proven as wrong. Answer: False 11. A theory is always true and can never be proven as wrong. Answer: False 12. Theories can be tested and validated through experimentation. Answer: True 13. If experimental results contradict a hypothesis, the hypothesis must be either revised or discarded. Answer: True 14. The Greek philosophers used observation and experimentation to understand the world. Answer: False 15. A scientific law is a brief statement that summarizes past observations and predicts future ones. Answer: True 16. The law of conservation of mass states, "In a chemical reaction matter can be created and destroyed." Answer: False 17. Antoine Lavoisier observed that burning objects in a closed container resulted in a loss of mass. Answer: False 18. A scientific theory describes the underlying reasons for observations and laws. Answer: True 19. The scientific method ensures that poor theories are eliminated over time and good theories remain. Answer: True 20. A theory is the equivalent of an opinion. Answer: False 21. Antoine Lavoisier proposed the atomic theory. Answer: False 22. John Dalton proposed the atomic theory. Answer: True 23. The first step in acquiring scientific knowledge is often the observation or measurement of some aspect of nature. Answer: True 24. If a hypothesis is falsifiable, it means that the hypothesis was once considered true but is now considered false. Answer: False 25. Observations from experiments are used to test theories. Answer: True 26. A theory can only exist after many experiments have validated a hypothesis. Answer: True 27. Scientific theories are also called models. Answer: True 28. The atomic theory explains why the law of conservation of mass is true. Answer: True 29. An established theory is the pinnacle of scientific understanding. Answer: True 30. Quantification is an important tool in understanding chemistry. Answer: True 31. Quantification involves measurement as part of an observation. Answer: True 32. Lavoisier developed the law of conservation of mass. Answer: False 33. The phlogiston theory of combustion is still considered correct today. Answer: False Multiple Choice Questions 34. Which of the following statements about soda pop is FALSE? A) Soda pop is a chemical mixture of mostly sugar, water and carbon dioxide. B) The molecules important to fizzing are carbon dioxide and water. C) The carbon dioxide is forced to mix with the water by the presence of sugars. D) When a can is opened, the pressure release allows carbon dioxide to form bubbles. E) All of the above statements are true. Answer: C 35. Which of the following items does NOT contain chemicals? A) drain cleaner B) organically grown vegetables C) air D) insecticides E) All of the above contain chemicals. Answer: E 36. A good definition of chemistry is: A) the science that seeks to understand what matter does by studying what atoms and molecules do. B) the science that seeks to understand what living organisms do by studying the molecules that make up the organism. C) the science that seeks to understand what the universe does by studying interactions of molecules with atoms. D) the science that seeks to understand the interactions of molecules for the sake of advancing human control over nature. E) none of the above Answer: A 37. Which statement about the scientific method is TRUE? A) The scientific method emphasizes reason as the way to understand the world. B) The scientific method emphasizes observation and reason as the way to understand the world. C) The scientific method emphasizes observation and experimentation as the way to understand the world. D) The scientific method emphasizes scientific laws as the way to understand the world. E) All of the above statements are false. Answer: C 38. Which of the statements below is NOT part of the scientific method? A) observation and measurement B) formation of a hypothesis C) testing of a hypothesis by experimentation D) refinement of a hypothesis as needed E) All of the above steps are part of the scientific method. Answer: E 39. Which statement about a hypothesis is TRUE? A) It is a tentative interpretation or explanation. B) It has the potential to be proven wrong. C) It can be tested by experiments. D) It is part of the scientific method. E) All of the above statements are true. Answer: E 40. The definition of a scientific law is: A) the same as a hypothesis. B) a way of learning that emphasizes observation and experimentation. C) the underlying reason for a scientific theory. D) a number of similar observations generalized into a brief statement summarizing past observations and predicting new ones. E) none of the above Answer: D 41. What term best describes a brief statement that summarizes many past observations and predicts new ones? A) experiment B) hypothesis C) scientific law D) theory E) none of the above Answer: C 42. Who discovered the law of conservation of mass? A) John Dalton B) Antoine Lavoisier C) Nivaldo Tro D) John Dalton and Antoine Lavoisier E) none of the above Answer: B 43. Which of the following is an example of a scientific law? A) All matter is composed of small, indestructible particles called atoms. B) In a chemical reaction, matter is neither created nor destroyed. C) When a can of soda pop is opened, a fizzing sound is heard. D) Flammable objects contain phlogiston. E) none of the above Answer: B 44. What is the definition of a scientific theory? A) a brief statement that summarizes past observations and predicts future ones B) a model that explains the underlying reasons for observations and laws C) the equivalent of a scientific opinion which others may disagree with D) a method of learning that emphasizes reason as the way to understand the world E) none of the above Answer: B 45. Who discovered the atomic theory? A) John Dalton B) Antoine Lavoisier C) Nivaldo Tro D) John Dalton and Antoine Lavoisier E) none of the above Answer: A 46. Which of the following is an example of an observation? A) All matter is composed of small, indestructible particles called atoms. B) Reactions occur due to the transfer of electrons. C) When a can of soda pop is opened, a fizzing sound is heard. D) Flammable objects contain phlogiston. E) none of the above Answer: C 47. A sample of wood with a mass of 3.0 grams was burned in an open dish. The ashes weighed 1.2 grams. What happened to the rest of the wood? A) The remaining mass was destroyed. B) The remaining 1.8 grams was converted into gaseous compounds. C) Nothing, the burned wood simply has a mass of 1.2 grams. D) The remaining 1.8 grams was converted into heat. E) none of the above Answer: B 48. Which statement accurately describes the purpose of experiments? A) Experiments are designed to produce the results predicted by a theory. B) Experiments can be replaced by a simple, logical reasoning of known facts. C) Experiments are designed to produce unexplainable results for further investigation. D) Experiments look for other observable predictions of a theory. E) none of the above Answer: D 49. Which of the following would be considered a theory? A) Glass is fragile. B) Hot air rises. C) Gasoline has a very strong odor. D) Helium balloons float because helium is less dense than air. Answer: D 50. The key to success in chemistry is: A) curiosity. B) mathematical skills. C) commitment. D) practice. E) all of the above Answer: E Essay Questions 51. What is chemistry? Answer: Chemistry is branch of science that explains the properties and behavior of different forms of matter, in the broadest sense, by helping us understand the atoms and molecules that compose them. 52. What are the important characteristics of the scientific method? Answer: The important characteristics of the scientific method include the observation of phenomena, the formulation of a hypothesis to explain the observed phenomena, the testing of the hypothesis by experiment, and the formulation of laws and theories. 53. What is the difference between a scientific law and a scientific theory? Answer: A statement based on a number of similar observations that may predict future outcomes of similar experiments is a scientific law. Laws are subject to further experiments and may be proven wrong or be validated. Theories are models of the way nature behaves, and are the products of several well-established and tested scientific laws. 54. Charcoal was burned in a barbecue grill. The ashes that remained weighed considerably less than the charcoal that was burned. Does this mean that the law of conservation of mass is wrong? Explain. Answer: No. The gaseous products formed during the combustion of charcoal escaped into the air and are not accounted for. If all those products could have been collected and weighed along with the ashes, the total mass of the products would have been equal to the mass of the charcoal. Chapter 2 Measurement and Problem Solving True/False Questions 1. Numbers are usually written so that the uncertainty is in the last reported digit. Answer: True 2. The decimal number 0.0000010 expressed in scientific notation is 1.0 × 106. Answer: False 3. The decimal number 0.0210 expressed in scientific notation is 2.10 × 10-2. Answer: True 4. The mass of an object, 4.55 × 10-3 g, expressed in decimal notation is 0.000455 g. Answer: False 5. If you count 7 pennies, you can only report one significant figure in that measurement. Answer: False 6. Exact numbers have an unlimited number of significant figures. Answer: True 7. Zeros located between two numbers are not significant. Answer: False 8. Zeros located after a number and after a decimal point are significant. Answer: True 9. Trailing zeros at the end of a number, but before an implied decimal point, are ambiguous. Answer: True 10. The number 0.010100 has five significant figures. Answer: True 11. The number 4,450,000.0 has 3 significant figures. Answer: False 12. The number 7.20 × 103 contains three significant figures. Answer: True 13. When the temperature of an object is reported as 23.7°C, the actual temperature can be assumed to be between 23.6°C and 23.8°C. Answer: True 14. Scientific numbers are reported so that every digit is certain except the last, which is estimated. Answer: True 15. When the number 65.59 is rounded to contain 2 significant figures, it becomes 66.0. Answer: False 16. When the number 2.35 is rounded to contain 2 significant figures it becomes 2.4. Answer: True 17. In multiplication and division calculations, the answer will have the same number of decimal places as the number carrying the fewest decimal places. Answer: False 18. In multiplication or division calculations, the answer will have the same number of decimal places as the number carrying the most decimal places. Answer: False 19. In addition or subtraction, the result carries the same number of decimal places as the quantity carrying the fewest decimal places. Answer: True 20. The mass of an object depends on gravity. Answer: False 21. The standard unit of length in the SI system is the cm. Answer: False 22. The standard unit of mass in the SI system is the kg. Answer: True 23. The prefix nano represents the multiplier 0.000000001. Answer: True 24. The prefix micro represents the multiplier 0.001. Answer: False 25. A nine gigagram mass is heavier than a nine nanogram mass. Answer: True 26. There are 1000 kilometers in one meter. Answer: False 27. You do not need to write units in calculations as long as you can remember them. Answer: False 28. Conversion factors are constructed from any two quantities known to be equivalent. Answer: True 29. A conversion factor is a fraction with one unit on top and a different unit on the bottom. Answer: True 30. A solution map diagrams the steps required to get from the starting point to the end point of a calculation problem. Answer: True 31. A solution map is the section near the back of the textbook that provides the answers to assigned problems. Answer: False 32. One mile measures 5,280 feet long, so one square mile is equivalent to 5,280 square feet. Answer: False 33. Given that 1 inch equals 2.54 centimeters, then 1 cubic inch equals 16.387 cubic centimeters. Answer: True 34. All solids have the same density. Answer: False 35. Suppose a perfectly symmetric metal rod of the element lead has a density of 11.4 g/cm3. If this rod is cut in half, the density of each piece is now 5.7 g/cm3. Answer: False 36. If you are given the mass and density of an object, you can calculate the volume by using the equation: V = m/d. Answer: True 37. If you know the density of a liquid and its volume, the mass of the liquid may be calculated using the equation: m = V/d. Answer: False Multiple Choice Questions 38. The correct scientific notation for the number 0.00050210 is: A) 5.0210 × 104 B) 5.021 × 10-4 C) 5.021 × 104 D) 5.0210 × 10-4 E) none of the above Answer: D 39. The correct scientific notation for the number 500.0 is: A) 5 × 102 B) 5.00 × 102 C) 5.000 × 102 D) 5 × 10-2 E) none of the above Answer: C 40. The distance between the two hydrogen atoms in a molecule of water is 0.000000000172 m. Express this distance in scientific notation. A) 1.72 ×10-9 m B) 1.72 × 10-10 m C) 0.172 × 10-10 m D) 17.2 × 109 m E) 1.72 × 1010 m Answer: B 41. The wavelength of blue light is 0.00000045 m. Express this wavelength in scientific notation. A) 4.5 × 10-6 m B) 4.5 × 106 m C) 4.5 × 10-7 m D) 4.5 × 107 m E) 0.45 × 10-7 m Answer: C 42. The correct decimal representation of 1.201 × 10-7 is: A) 12010000 B) 0.0001201 C) 0.0000001201 D) 1201.000 E) none of the above Answer: C 43. The correct decimal representation of 6.453 × 103 is: A) 6,453 B) 0.006453 C) 6.5 × 103 D) 6.453 E) none of the above Answer: A 44. Suppose a thermometer has marks at every one degree increment and the mercury level on the thermometer is exactly between the 25 and 26 degree Celsius marks. We should properly report the temperature measurement as A) 25°C B) 26°C C) 25.5°C D) 25.50°C E) 25.55°C Answer: C 45. In the number 48.93, which digit is estimated? A) 4 B) 8 C) 9 D) 3 E) None of the above, all digits are certain. Answer: D 46. There are exactly 2.54 centimeters in 1 inch. When using this conversion factor, how many significant figures are you limited to? A) 1 B) 3 C) ambiguous D) depends on if you are using it in multiplication/division or addition/subtraction E) infinite number of significant figures Answer: E 47. The correct number of significant figures in the number 865,000 is: A) 3 B) 6 C) 4 D) ambiguous E) none of the above Answer: D 48. The correct number of significant figures in the number 1.250100 is: A) 5 B) 7 C) 4 D) ambiguous E) none of the above Answer: B 49. The correct number of significant figures in the number 0.027090 is: A) 7 B) 6 C) 5 D) ambiguous E) none of the above Answer: C 50. The correct number of significant figures in the number "9.080 × 10-4" is A) 3 B) 4 C) 5 D) ambiguous E) none of the above Answer: B 51. The correct number of significant figures in the number 4.0 × 10-2 is: A) 1 B) 2 C) 3 D) ambiguous. E) none of the above Answer: B 52. The correct number of significant figures in the number 0.002320 is: A) 7 B) 4 C) 3 D) ambiguous E) none of the above Answer: B 53. Which of the following statements is NOT part of the rules for determining significant figures? A) Non-zero digits at the end of a number are not significant. B) Zeroes between two numbers are significant. C) Zeroes to the left of the first non-zero number are not significant. D) Zeroes at the end of a number, but before a decimal are ambiguous. E) All of the above statements are part of the rules. Answer: A 54. When the value 4.449 is rounded to two significant figures, the number should be reported as: A) 4.4 B) 4.5 C) 4.44 D) 4.45 E) none of the above Answer: A 55. How many significant digits should be reported in the answer to the following calculation? (4.3 - 3.7) × 12.3 = A) 1 B) 2 C) 3 D) 4 E) none of the above Answer: A 56. Determine the answer for the equation below with correct number of significant figures: 3.215 × 13.2 ÷ 0.218 = ________ A) 194.669 B) 195 C) 194.7 D) 194.67 E) none of the above Answer: B 57. Determine the answer for the equation below with correct number of significant figures: 1.2 × 1.79 = ________ A) 2.148 B) 2.15 C) 2.1 D) 2.2 E) none of the above Answer: C 58. Determine the answer to the following equation with correct number of significant figures: 106 ÷ 9.02 × 1.9 = ________ A) 22.32816 B) 22.328 C) 22.3 D) 22 E) none of the above Answer: D 59. Determine the answer to the following equation with correct number of significant figures: 2.02 + 8.102 - 0.0297 = ________ A) 10.0923 B) 10.09 C) 10.1 D) 10.092 E) none of the above Answer: B 60. Determine the answer to the following equation with correct number of significant figures: 13.96 - 4.9102 + 71.5 = ________ A) 80.5498 B) 81 C) 80.5 D) 80.55 E) none of the above Answer: C 61. Determine the answer to the following equation with correct number of significant figures: (4.123 × 0.12) + 24.2 = ________ A) 25 B) 24.695 C) 24.70 D) 24.7 E) none of the above Answer: D 62. Determine the answer to the following equation with correct number of significant figures: (17.103 + 2.03) × 1.02521 = ________ A) 19.6153 B) 19.62 C) 19.6 D) 20 E) none of the above Answer: B 63. The correct prefix for the multiplier 1,000,000 is: A) mega. B) milli. C) micro. D) nano. E) none of the above Answer: A 64. The correct prefix for the multiplier 1,000 is: A) mega. B) milli. C) micro. D) nano. E) none of the above Answer: E 65. The correct prefix for the multiplier 0.1 is: A) tera. B) deci. C) femto. D) pico. E) none of the above Answer: B 66. The correct prefix for the multiplier 0.000001 is: A) mega. B) milli. C) micro. D) nano. E) none of the above Answer: C 67. The correct prefix for the multiplier 1,000,000,000 is: A) mega. B) milli. C) tera. D) giga. E) none of the above Answer: D 68. The correct multiplier for the prefix pico is: A) 10-3 B) 10-6 C) 10-9 D) 10-12 E) none of the above Answer: D 69. The correct multiplier for the prefix femto is: A) 10-15 B) 10-12 C) 1012 D) 109 E) none of the above Answer: A 70. The correct multiplier for the prefix milli is: A) 10-3 B) 10-6 C) 10-9 D) 10-12 E) none of the above Answer: A 71. The correct multiplier for the prefix micro is: A) 103 B) 10-6 C) 10-9 D) 106 E) none of the above Answer: B 72. What is the standard SI unit for length? A) mile B) centimeter C) foot D) meter E) none of the above Answer: D 73. What is the standard SI unit for mass? A) kilogram B) gram C) pound D) ton E) none of the above Answer: A 74. The standard SI unit for temperature is: A) Fahrenheit. B) Kelvin. C) Celsius. D) atmospheres. E) none of the above. Answer: B 75. Which measurement below represents the heaviest mass? A) 1 mg B) 1 kg C) 1 pg D) 1 Mg E) 1 dg Answer: D 76. Which of the following sets of units is NOT in the order of increasing size? A) μg < g < kg B) mL < dL < L C) ns < ms < s D) cm < μm < km E) μmol < mmol < mol Answer: D 77. An American nickel five cent coin has a mass of approximately 5 grams. Five grams is equivalent to which term? A) 5000 kilograms B) 5000 milligrams C) 50 centigrams D) 5000 micrograms E) none of the above Answer: B 78. Which of the following would NOT be considered a correct conversion factor? A) 1 dozen eggs = 12 eggs B) 12 eggs = 1 dozen eggs C) 1 pair of shoes = 1 shoe D) 100 pennies = 1 dollar E) 5 cents = 1 nickel Answer: C 79. The common English unit in which the speed of an automobile is expressed is miles/hr. What is the set of standard SI units for speed? A) mile/s B) km/hr C) km/s D) m/s E) none of the above Answer: D 80. The typical problem-solving procedure involves four steps in the order: A) sort, strategize, solve, check B) strategize, solve, sort, check C) check, strategize, sort, solve D) solve, sort, check, strategize Answer: A 81. How many inches are in 25.8 cm? A) 0.10 B) 28.3 C) 0.0984 D) 10.2 E) none of the above Answer: D 82. How many inches are in 2.80 ft? A) 34 B) 33.6 C) 0.233 D) 4.29 E) none of the above Answer: B 83. How many grams are in 1.48 × 107 μg? A) 1.48 × 103 B) 1.48 × 1013 C) 1.48 D) 14.8 E) none of the above Answer: D 84. How many milliliters are in 17.5 L? A) 175 B) 1.75 × 10-2 C) 1.75 × 103 D) 1.75 × 104 E) none of the above Answer: D 85. How many microliters are in 41.0 mL? A) 4.1 × 103 B) 4.1 × 1010 C) 0.041 D) 4.10 × 104 E) none of the above Answer: D 86. How many liters are in 333 mL? A) 3.33 × 105 B) 0.333 C) 33.3 D) 3.33 E) none of the above Answer: B 87. How many low dose 81 mg aspirin tablets can be made from 1.21 kg of aspirin? A) 1.5 × 103 tablets B) 1.5 × 104 tablets C) 1.5 × 105 tablets D) 1.21 × 103 tablets E) 1.21 × 104 tablets Answer: B 88. A 12-oz can of soda pop costs fifty cents. A 2.00 L bottle of the same variety of soda pop costs $1.29. How many times more expensive it is to buy the 12-oz can of pop compared to buying it in a 2.00 L bottle? (1.00 L = 1.057 quart and 1 quart contains 32 oz) A) 1.9 B) 2.2 C) 2.6 D) 2.8 E) 4.2 Answer: B 89. How many cm3 are there in 2.5 m3? A) 2.5 × 106 B) 2.5 × 10-2 C) 2.5 × 102 D) 2.5 × 10-6 E) none of the above Answer: A 90. How many cm3 are there in 1.25 ft3? A) 38.1 B) 5.49 × 103 C) 246 D) 3.54 × 104 E) none of the above Answer: D 91. A room has dimensions of 10.0 ft × 20.0 ft × 8.00 ft. Given that there are three feet in a yard, what is the volume of the room in yd3? A) 178 B) 59.3 C) 1.60 × 103 D) 533 E) none of the above Answer: B 92. What is the volume of a cube with dimensions 11.0 cm × 11.0 cm × 11.0 cm in m3? A) 1.331 × 10-3 B) 1.33 × 103 C) 1.33 × 10-3 D) 1.3 × 103 E) none of the above Answer: C 93. Which term below is equivalent to one milliliter? A) 1 cc B) 1 mL C) 1 cm3 D) all of the above E) none of the above Answer: D 94. A plastic block has dimensions of 2.2 cm × 3.0 cm × 1.5 cm and a mass of 12.4 grams. Will the block float in water and why? A) Yes, because the density of the block is 1.3 g/mL which is less than the density of water. B) Yes, because the density of the block is 0.80 g/mL which is less than the density of water. C) No, because the density of the block is 1.3 g/mL which is greater than the density of water. D) No, because the density of the block is 0.80 g/mL which is greater than the density of water. E) none of the above Answer: C 95. Suppose a boat engine leaks 938 milliliters of oil into a lake. The mass of this spilled oil is 823 grams. The oil will not mix with the lake water. Which statement is true? A) The oil will sink because its density of 0.877 g/mL is greater than the density of water. B) The oil will float because its density of 0.877 g/mL is less than the density of water. C) The oil will sink because its density of 1.14 g/mL is greater than the density of water. D) The oil will float because its density of 1.14 g/mL is less than the density of water. E) none of the above Answer: B 96. A lead ball has a mass of 55.0 grams and a density of 11.4 g/cm3. What is the volume of the ball? A) 0.207 mL B) 0.207 L C) 4.82 mL D) 4.82 L E) none of the above Answer: C 97. Given the density of Au is 19.3 g/cm3, determine the mass of gold in an ingot with the dimensions of 10.0 in × 4.00 in × 3.00 in. A) 3.80 × 104 B) 102 C) 2.32 × 103 D) 0.161 E) none of the above Answer: A 98. What is the density (g/mL) of an object that has a mass of 14.01 grams and, when placed into a graduated cylinder, causes the water level to rise from 25.2 mL to 33.6 mL? A) 0.60 B) 1.7 C) 1.8 D) 2.4 E) none of the above Answer: B 99. An object weighing 1.840 kg has a volume of 0.0015 m3. What is the density of the object in g/cm3? A) 1.2 B) 0.0012 C) 0.82 D) 0.0028 E) none of the above Answer: A 100. Given the following list of densities, which materials would float in a molten vat of lead provided that they do not themselves melt? Densities (g/mL): lead = 11.4, glass = 2.6, gold = 19.3, charcoal = 0.57, platinum = 21.4. A) gold and platinum B) glass and charcoal C) gold, platinum, glass and coal D) gold and charcoal E) none of the above Answer: B 101. A popular science demonstration is to take several liquids that will not mix together and "stack" these liquids in a tall glass cylinder. Suppose the following three liquids were placed in the same tall, narrow glass cylinder: These liquids would stack in which order? A) corn syrup on top, motor oil in the middle, vinegar on the bottom B) vinegar on top, motor oil in the middle, corn syrup on the bottom C) motor oil on top, corn syrup in the middle, vinegar on the bottom D) corn syrup on top, vinegar in the middle, motor oil on the bottom E) motor oil on top, vinegar in the middle, corn syrup on the bottom Answer: E 102. The distance from New York City to Washington, DC is approximately 235 miles. Identify the correct solution map to convert from miles to kilometers using the prefix multipliers and the given conversion factors: 1 mile = 5280 ft; 1 ft = 12 in; 1 in = 2.54 cm. Answer: C 103. The Olympic Games shot put field event uses a 16 pound (lb) shot. Identify the correct solution map to convert from pounds to kilograms using prefix multipliers and the given conversions of 16 0z = 1 lb and 453.6 g = 16 oz. Answer: C Algorithmic Questions 104. The exponential 104 is equal to which decimal number? A) 10,000 B) 1 C) 10 D) 100 E) none of the above Answer: A 105. The decimal value 10 is equal to which exponential? A) 104 B) 103 C) 102 D) 101 E) none of the above Answer: D 106. The decimal value 0.01 is equal to which exponential? A) 10-3 B) 10-2 C) 10-4 D) 10-5 E) none of the above Answer: B 107. The exponential 10-3 is equal to which decimal number? A) 0.1 B) 0.001 C) -0.00001 D) -0.0001 E) none of the above Answer: B 108. How would the number 8,155 be written in scientific notation? A) 8.155 × 103 B) 8.155 × 10-1 C) 8.155 × 101 D) 8.155 × 10-3 E) none of the above Answer: A 109. How would the number 1.09 × 101 be expressed in decimal form? A) 109 B) 0.109 C) 1.09 D) 10.9 E) none of the above Answer: D 110. How many significant digits are in the number 2903? A) 2 B) 5 C) 4 D) 3 E) none of the above Answer: C 111. When rounding the number 2.348615 to 4 significant digits, what is the correct value? A) 2.3490 B) 2.340 C) 2.349 D) 2.348 E) none of the above Answer: C 112. How many significant figures should be reported in the answer to the following calculation? (8.50) × (29.0) × (1.0947) = A) 3 B) 2 C) 4 D) 5 E) none of the above Answer: A 113. How many significant digits should be reported in the answer to the following calculation? (13.21)(14.021)/(2.00) = A) 3 B) 4 C) 2 D) 5 E) none of the above Answer: A 114. How many significant digits should be reported in the answer to the following calculation? (4.921) + (16.2) = A) 3 B) 2 C) 1 D) 4 E) none of the above Answer: A 115. How many significant digits should be reported in the answer to the following calculation? (43.980) × (19.0023 + 25) = A) 3 B) 2 C) 4 D) 1 E) none of the above Answer: B 116. The prefix micro represents which multiplier? A) 0.000001 B) 1,000,000 C) 0.001 D) 1,000 E) none of the above Answer: A 117. The multiplier 0.01 is represented by which prefix? A) kilo- B) deci- C) centi- D) milli- E) none of the above Answer: C 118. How many inches are in 6.32 cm? A) 16.1 B) 2.49 C) 3.78 D) 8.86 E) none of the above Answer: B 119. How many in3 are in 2.20 cm? A) 36.1 B) 10.6 C) 0.1340 D) 7.45 E) none of the above Answer: C 120. What is the density of 96 mL of a liquid that has a mass of 90.5 g? A) 0.94 g/mL B) 1.1 g/mL C) 186.5 g/mL D) 28.4 g/mL E) none of the above Answer: A 121. What is the volume of 12.8 g of a liquid that has a density of 0.789 g/mL? A) 12.8 mL B) 16.2 mL C) 10.7 mL D) 13.6 mL E) none of the above Answer: B Test Bank for Introductory Chemistry Nivaldo J. Tro 9780321741028, 9780321687937, 9781256112938, 9781256161066, 9780134302386, 9780321910073

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