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  1. S

    limitations of models

    "discuss the limitations of models of ionic lattices, covalent molecules and covalent and metallic lattices." any help would be appreciated.
  2. S

    insoluble

    could you name a few insoluble liquids in water ( that i could have easy access to) for example oil...
  3. S

    experiment help

    i need to do a first hand investigation for biology. i want my experiment to be based on plants... but i don't exactly know what to do. so could you help me?
  4. S

    industrial separation processes

    identify properties of bauxite used in its separation? could someone plz post some info on this topic or any related links
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