Practice Quiz

FE Civil Engineering Exam Prep - Question List

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11. 80.0 grams of NaOH is dissolved in 3.0 moles of H20. What is the mole fraction of NaOH in this solution?
  1. .20
  2. .37
  3. .40
  4. .64
  5. .79
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12. A saturated solution of NaCl is heated until more solute can be dissolved. How is this solution best described?
  1. Dilute
  2. Immiscible
  3. Supersaturated
  4. Unsaturated
  5. Hydrophobic
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13. The half-life of 32 grams of a radioactive substance is 6.5 hours. How many grams of the substance remain after 19.5 hours?
  1. 16 grams
  2. 8 grams
  3. 4 grams
  4. 2 grams
  5. 32 grams
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14. Which of the following compounds is classified as a metallic oxide?
  1. H2O
  2. Na2O
  3. CO2
  4. NO2
  5. SO2
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15. What property of a metal refers to its ability to be hammered into sheets?
  1. Ductility
  2. Thermal conductivity
  3. Electrical conductivity
  4. Malleability
  5. Density
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