August 2016 Chemistry Regents #16-20
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Questions | Answer | Links | Explanations |
16 Which statement describes particles of an ideal gas, based on the kinetic molecular theory? (1) Gas particles are separated by distances smaller than the size of the gas particles. (2) Gas particles do not transfer energy to each other when they collide. (3) Gas particles have no attractive forces between them. (4) Gas particles move in predictable, circular motion. | 3 | ||
17 Which expression could represent the concentration of a solution? (1) 3.5 g (3) 3.5 mL (2) 3.5 M (4) 3.5 mol | 2 | ||
18 Which form of energy is associated with the random motion of the particles in a sample of water? (1) chemical energy (3) nuclear energy (2) electrical energy (4) thermal energy | 4 | ||
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19 Which change is most likely to occur when a molecule of H2 and a molecule of I2 collide with proper orientation and sufficient energy? (1) a chemical change, because a compound is formed (2) a chemical change, because an element is formed (3) a physical change, because a compound is formed (4) a physical change, because an element is formed | 1 | ||
20 Which changes can reach dynamic equilibrium? (1) nuclear changes, only (2) chemical changes, only (3) nuclear and physical changes (4) chemical and physical changes | 4 | ||
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