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5 Written questions

5 Matching questions

  1. solution
  2. molarity
  3. halogens
  4. endothermic
  5. La Chatelier's Principle
  1. a -changing equilibrium
    idea: if you have reaction @ chemical equilibrium, w/e you do, equilibrium will adjust to reduce whatever you added
  2. b -process that absorbs energy
    -energy is the reactant
    -usually, but not always, it lowers the temperature of the surroundings
    *graph starts from low to high
    *activation energy is the entire graph
  3. c -elements in group 17
  4. d # of moles/# of liters of soln

    *molarity abbreviated with M
    *when its a gas: 1mol/22.4L of soln
  5. e a mixture where the substances are dissolved

5 Multiple choice questions

  1. -all on the left side of the staircase
  2. the substance that usually dissolves the solute *water
  3. 1. increase temperature
    2. increase pressure
    3. decrease volume
    4. increase # of particles
  4. when there stops being an observable change in a system, either static or dynamic
  5. -273 degrees Celsius, 0 degrees Kelvin

5 True/False questions

  1. ways to decrease the rate of reaction1. decrease temperature
    2. decrease pressure
    3. increase volume
    4. decrease # of particles

          

  2. molethe substance that is usually dissolved(sugar or salt)

          

  3. "finished" reaction-rate is constant (rate=0, beaker is not changing)
    -no more reactions possible bc forward and reverse reactions can occur
    -no more reactants

          

  4. What happens during a chemical reaction?a type of change, in which, macroscopically: one or more different substances form that were not there originally; and, nanoscopically:one or more particles becomes one or more different particles that were not there originally -- original substances are no longer present

          

  5. Law of Conservation of Massthe mass is grams of 1 mole of particles of a substance

          

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