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Yr7 slide share stuff

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yr7 flashcards

yr7 flashcards


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Transcript

  • 1. airA mixture consisting of 78% nitrogen, 21%oxygen and 1% other gases & water vapour.
  • 2. alloyA mixture of metals, e.g. brass.
  • 3. boiling pointWater boils at 100ºC The temperature at which a liquid changes to a gas.
  • 4. chromatographyA method of separating substances.The substances are separatedas they move, in asolvent, through amaterial, e.g. paper.The substances oftenmove at different speeds.
  • 5. condenserA piece of apparatus which cools a gas to change it to a liquid.
  • 6. crude oilA valuable mixture of many differenthydrocarbons. Many useful chemicals can be extracted from it.
  • 7. dissolve The process that occurs when a solute is added to a suitable solvent, e.g. salt will dissolve in water.