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  1. S

    Chemistry exam question help please?

    Explain how a change in the primary structure of a globular protein may result in a different 3 dimensional structure? (3 marks)
  2. S

    For my theory test revision, I am just using the aa highway code book that is up to

    date......? Is this enough, i know i need the cd to practise hazard perception. thanks sorry if in the wrong catagory! coundnt find a more suitable one
  3. S

    AS AQA Chemistry help please?

    The absolute mass of one ion/g of 12Carbon is 1.993*10^ -23 and its relative abundance is 98.9%, whereas 13Carbon's absolute mass of one ion/g is 2.158*10^ -23 with relative abundance of 1.1%. What is the mass of one neutron? What is the relative isotopic mass of Carbon-13? How on earth do i...
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