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27 Cards in this Set
- Front
- Back
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1. You measure water in two containers: a 10-mL graduated cylinder with marks at every mL, and a 1-mL pipet marked at every 0.1 mL. If you have some water in each of the containers, and add them together, to what decimal place could you measure the total?
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A) 0.01 mL
B) 0.1 mL C) 1 mL D) 10 mL E) none of these |
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2. You are asked to determine the perimeter of the cover of your textbook. You measure the length as 33.74 cm and the width as 24.83 cm. How many significant figures should you report for the perimeter?
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A) 1
B) 2 C) 3 D) 4 E) 5 |
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3. A monolayer containing 3.19e–6 g of oleic acid has an area of 20.0 cm2. The density of oleic acid is 0.895 g / mL. What is the thickness of the monolayer (the length of an oleic acid molecule)?
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A) 7.13e–5 cm
B) 5.61e6 cm C) 1.43e–7 cm D) 1.78e–7 cm E) 1.43e–7 cm |
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4. The calibration points for the linear Reaumur scale are the usual melting point of ice and boiling point of water, which are assigned the values 0°R and 80°R, respectively. The normal body temperature of humans is 98.6°F. What is this temperature in °R?
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A) 37.0
B) 28.0 C) 29.0 D) 29.6 E) none of these |
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5. As warm water sits in a cool room, you measure the temperature change. Which of the following is true?
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A) The temperature change is bigger if you are measuring in °F.
B) The temperature change is bigger if you are measuring in °C. C) The temperature change will be the same regardless of the scale you use. D) Answer a or b is correct, depending on the difference in temperature between the water and the room. E) none of the above |
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6. A 20.0 mL sample of glycerol has a mass of 25.0 grams. What is the density of glycerol in ounces / quart?
(1.00 ounce = 28.4 grams, and 1.00 liter = 1.06 quarts) |
A) 41.5 oz / qt
B) 4.15e–2 oz / qt C) 830 oz / qt D) 46.7 oz / qt E) 26.6 oz / qt |
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7. An example of a pure substance is
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A) elements.
B) compounds. C) pure water. D) carbon dioxide. E) all of these |
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8. A quantitative observation
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A) contains a number and a unit.
B) does not contain a number. C) always makes a comparison. D) must be obtained through experimentation. E) none of these |
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9. Convert 0.5053 m to mm.
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A) 505.3 mm
B) 5.053e–3 mm C) 5.053e–4 mm D) 0.05053 mm E) none of these |
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10. Convert 716 mi to km. (1 m = 1.094 yds, 1 mi = 1760 yds)
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A) 7.83e2 km
B) 4.45e2 km C) 1.15e9 km D) 6.54e2 km E) 1.15e3 km |
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11. Which of the following is the least probable concerning five measurements taken in the lab?
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A) The measurements are accurate and precise.
B) The measurements are accurate but not precise. C) The measurements are precise but not accurate. D) The measurements are neither accurate nor precise. E) All of these are equally probable. |
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12. The state of matter for an object that has both definite volume and definite shape is
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A) solid state.
B) liquid state. C) gaseous state. D) elemental state. E) mixed state. |
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13. A method of separation that employs a system with two phases of matter, a mobile phase and a stationary phase, is called
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A) filtration.
B) chromatography. C) distillation. D) vaporization. E) homogenization. |
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14. Convert 4467 mL to qts. (1 L = 1.06 qt)
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A) 4735 qts
B) 4.214 qts C) 4.214e–3 qts D) 4214 qts E) 4.735 qts |
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15. In a recent accident some drums of uranium hexafluoride were lost in the English Channel. The melting point of uranium hexafluouride is 64.53oC. What is the melting point of uranium hexafluoride on the Fahrenheit scale?
(TF = TC (9oF / 5oC) + 32oF) |
A) 67.85 oF
B) 96.53 oF C) 116.2 oF D) 337.5 oF E) 148.2 oF |
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16. 8 seconds contain this many picoseconds.
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A) 8e12
B) 8e–12 C) 8e–9 D) 8e9 E) 8e15 |
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17. Convert 4373.5 g to mg.
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A) 4.3735 mg
B) 43.735 mg C) 437.35 mg D) 4.3735e3 mg E) 4.3735e6 mg |
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18. A freighter carrying a cargo of uranium hexafluoride sank in the English Channel late August 1984. The cargo of uranium hexafluoride weighed 2.251e8 kg and was contained in 30 drums, each having a volume of 1.62 106 L. What is the density (g / mL) of uranium hexafluoride?
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A) 1.39 g / mL
B) 4.63 g / mL C) 2.25 g / mL D) 0.216 g / mL E) 46.3 g / mL |
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19. A metric unit for length is
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A) gram.
B) milliliter. C) yard. D) kilometer. E) pound. |
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20. It is estimated that uranium is relatively common in the earth's crust, occurring in amounts of 4 g / metric ton. A metric ton is 1000 kg. At this concentration, what mass of uranium is present in 2.2 mg of the earth's crust?
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A) 9 nanograms
B) 9 micrograms C) 9 milligrams D) 9e–5 g E) 9 centigrams |
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21. Convert 5.9 kg to lb. (1 kg = 2.205 lb)
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A) 13 lbs
B) 1.3 lbs C) 2.7 lbs D) 1.3e–2 lbs E) 13.01 lbs |
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22. The degree of agreement among several measurements of the same quantity is called __________. It reflects the reproducibility of a given type of measurement.
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A) accuracy
B) error C) precision D) significance E) certainty |
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23. The statement “The total mass of materials is not affected by a chemical change in those materials” is called a(n)
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A) observation.
B) measurement. C) theory. D) natural law. E) experiment. |
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24. The density of gasoline is 0.7025 g/mL at 20°C. When gasoline is added to water:
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A) it will float on top.
B) it will sink to the bottom. C) it will mix so you can't see it. D) the mixture will improve the running of the motor. E) none of these things will happen. |
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25. Using the rules of significant figures, calculate the following: 4.0021-1.504
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A) 2.498
B) 2 C) 2.4981 D) 2.50 E) 2.5 |
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11. Phosphorus has the molecular formula P4 and sulfur has the molecular formula S8. How many grams of phosphours contain the same number of molecules as 6.41 g of sulfur?
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a) 3.10g
b) 3.21g c) 6.19g d) 6.41g e) none of these |
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Iron is biologically important in the transport of oxygen by red blood cells from the lungs to the various organs of the body. In the blood of an adult human, there are approximately 2.60 x 1013 red blood cells with a total of 2.90 g of iron. On the average, how many iron atoms are present in each red blood cell? (molar mass (Fe) = 55.85 g)
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8.33 x 10-10
1.20 x 109 3.12 x 1022 2.60 x 1013 5.19 x 10-2 |
