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5 Written Questions

5 Matching Questions

  1. metals
  2. "finished" reaction
  3. alkali metals
  4. solvent
  5. endothermic
  1. a -elements in group 1 except Hydrogen
  2. b -all on the left side of the staircase
  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 -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
  5. e the substance that usually dissolves the solute *water

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. 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
  4. the mass is grams of 1 mole of particles of a substance
  5. when there stops being an observable change in a system, either static or dynamic

5 True/False Questions

  1. semimetals/metalloids-elements in group 1 except Hydrogen

          

  2. complete reactiona 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. halogens-elements in group 17

          

  4. molar volume of a gas-at STP (standard temperature and pressure) *0 degrees Celsius and 1 atm
    - 1 mol has a volume of 22.L

          

  5. catalyst-all on the left side of the staircase

          

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