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5 Written questions

5 Matching questions

  1. alkali metals
  2. Law of Conservation of Mass
  3. mixture
  4. alkaline earth metals
  5. molar mass
  1. a a subtance with 2 or more different types of particles inside of it
  2. b -elements in group 2
  3. c the mass is grams of 1 mole of particles of a substance
  4. d -elements in group 1 except Hydrogen
  5. e the # of atoms of each element must be the same in both the reactants and the products of a chemical reaction

5 Multiple choice questions

  1. obvious when finished
  2. make more reactants and using more products
  3. when there stops being an observable change in a system, either static or dynamic
  4. During a chemical reaction, the reactants (starting chemicals) interact when they are brought together. Sometimes other conditions are needed (heat, a catalyst, etc) and sometimes the reaction will be spontaneous.

    During the reaction, the chemical bonds of one or more of the reactants. change and are reconfigured/combined with atoms or parts of other molecules from other reagents and form new product chemicals. All of the atoms of the reactants are preserved in the products, just in the form of different reaction product compounds. Heat may also be consumed or generated by the reaction. The products likely have different properties than the reactants.
  5. -elements in group 17

5 True/False questions

  1. solutiona mixture where the substances are dissolved

          

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

          

  3. shift to the Rmake more reactants and using more products

          

  4. La Chatelier's Principlea 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. "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

          

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