Practice Quiz

CLEP Chemistry Practice Test - Question List

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126. Calcium combines with boron, as represented by the chemical equation below:

Ca + 6B → CaB6

What is the minimum amount of calcium, in grams, that could completely react with 54.0 g of boron?
  1. 9.00 g
  2. 33.4 g
  3. 87.4 g
  4. 241 g
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127. Which of the following correctly pairs a phase of matter with its description?
  1. Solid: Particles have no motion.
  2. Liquid: Particles expand to fill any container in which they are placed.
  3. Gas: Particles have higher amounts of energy than when in the liquid phase.
  4. Liquid: Particles are more strongly attached to one another than when in the solid phase.
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128. Which of the following elements has an electron configuration of ls22s22p63s23p1?
  1. lithium
  2. aluminum
  3. phosphorus
  4. calcium
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129. During a series of experiments, a chemist found that a particular compound has an empirical formula of C2H5 and a molecular mass of 58.12 g/mol. What is the molecular formula of this compound?
  1. CH4
  2. C2H5
  3. C4H10
  4. C18H40
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130. What is the correct formula for aluminum oxide?
  1. AlO2
  2. Al2O3
  3. Al3O2
  4. Al3O6
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