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  1. M

    concerns in the physics practical

    damn....thanks btw....so im looking at max. of 4 marks lost?
  2. M

    concerns in the physics practical

    i wrote the values in the table with a pencil...am i goin to get penalised? if so then to what extent?
  3. M

    Chemistry Help!

    the first question says percentage by mass...so u add up the mr. and divide the mass of hydrogen and oxygen contained in the molecule by the molecules mr. if they are both equal to each other...u have ur answer...while the second is pretty straight forward....write out the equation and balance...
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