C2.1

    Cards (13)

    • What else can a pure substance be?
      A single compound
    • What is one of the simplest ways to determine if a substance is pure?
      Measure its melting and boiling points
    • At what does a pure substance melt?
      A specific fixed temperature
    • What kind of boiling point does a pure substance have?
      A specific fixed boiling point
    • How can you tell if water is pure based on its melting and boiling points?
      They are at specific fixed temperatures
    • What happens to the melting and boiling points of a mixture?
      They occur over a range of temperatures
    • What does a pure substance consist of?
      Only a single element or compound
    • What is a formulation?
      A complex mixture designed as a product
    • What is carefully measured in a formulation?
      The quantity of each component
    • Why is the quantity of each component carefully measured in a formulation?
      So the product has desired properties
    • Formula for relative formula mass?
      relative atomic mass added together
    • Does diamond have delocalised electrons?
      No, meaning it cannot conduct electricity.
    • Does graphite have delocalised electrons?
      Yes it has one delocalised electron, which moves freely around the structure meaning it conduct electricity.
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