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5 Written questions

5 Matching questions

  1. molarity
  2. halogens
  3. "finished" reaction
  4. molar mass
  5. alkaline earth metals
  1. a # of moles/# of liters of soln

    *molarity abbreviated with M
    *when its a gas: 1mol/22.4L of soln
  2. b -elements in group 2
  3. c -rate is constant (rate=0, beaker is not changing)
    -no more reactions possible bc forward and reverse reactions can occur
    -no more reactants
  4. d the mass is grams of 1 mole of particles of a substance
  5. e -elements in group 17

5 Multiple choice questions

  1. the # of atoms of each element must be the same in both the reactants and the products of a chemical reaction
  2. make more reactants and using more products
  3. -all on the right side of the staircase
  4. making more product and using more reactants
  5. 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 True/False questions

  1. compoundpure substance made from two or more elements and can be broken down into separate elements

          

  2. 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

          

  3. solutea mixture where the substances are dissolved

          

  4. exothermic-process that releases energy
    -energy is the product
    -usually, but not always, this raises
    *graph starts from high to low
    *activation energy is only first bump

          

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