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5 Written questions

5 Matching questions

  1. Coefficient
  2. Open System
  3. Physical Property
  4. Exothermic Reaction
  5. Chemical Property
  1. a A characteristic of a pure substance that can be observed without changing it into another substance
  2. b A reaction that releases energy in the form of heat
  3. c A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in the reaction
  4. d A characteristic of a pure substance that describes its ability to change into a different substance
  5. e A system in which matter can enter from or escape to the surrounding

5 Multiple choice questions

  1. A system in which no matter is allowed to enter or leave
  2. A chemical reaction that breaks down compounds into simpler products
  3. A solid that forms from a solution during a chemical reaction
  4. A material that increases the rate of a reaction by lowering the activation energy
  5. The principle stating that matter is not created or destroyed during a chemical reaction

5 True/False questions

  1. Chemical EquationA change in which on or more substances combine or break apart to form new substance

          

  2. Chemical ChangeA change in which on or more substances combine or break apart to form new substance

          

  3. CombustionA chemical reaction that breaks down compounds into simpler products

          

  4. Activation EnergyA characteristic of a pure substance that can be observed without changing it into another substance

          

  5. EnzymeA biological catalyst that lowers the activation energy of reactions in cells