Practice Quiz

MCAS Chemistry Exam Practice - Question List

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56. What is the mass of one mole of helium gas?
  1. 2 g
  2. 4 g
  3. 8 g
  4. 22 g
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57. Which of the following correctly describes molecules of two different gases if they are at the same temperature and pressure?
  1. They must have the same mass.
  2. They must have the same velocity.
  3. They must have the same average kinetic energy.
  4. They must have the same average potential energy.
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58. A solution that contains less solute than it can hold at a given temperature is
  1. disassociated.
  2. saturated.
  3. supersaturated.
  4. unsaturated.
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59. The atomic number of an element indicates which of the following?
  1. the number of neutrons in the atom
  2. the number of protons in the atom
  3. the sum of the neutrons and protons in the atom
  4. the sum of the protons and electrons in the atom
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60. Which of the following is not true of a sample of gas as it is heated in a rigid, closed container?
  1. The pressure of the molecules increases.
  2. The average speed of the molecules increases.
  3. The average distance between molecules increases.
  4. The number of collisions between molecules increases.
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