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  1. D

    Biology HSC exam 2005 question 12

    Ah yes that just clicked. Thanks
  2. D

    Biology HSC exam 2005 question 12

    Could anyone help me understand why the answer is D? (D) Water molecules move by osmosis from an area of low solute concentration to an area of high solute concentration. Water can't move from an area of low concentration to high concentration through osmosis because that would require...
  3. D

    2012 HSC chemistry Multiple Choice

    Oh ok. Thanks for your help
  4. D

    2012 HSC chemistry Multiple Choice

    Im still a little confused because the Cr standard potential has +3e- while the Fe has +e-. Dont you have to times the Fe by three so it is balanced out? Thanks.
  5. D

    2012 HSC chemistry Multiple Choice

    Hey does anyone know how to do this? This equation represents a common redox reaction. Cr2O72–(aq) + 14H+(aq) + 6Fe2+(aq) → 2Cr3+(aq) + 6Fe3+(aq) + 7H2O(l) 14 What is the value of E−cell ° for the reaction? (A) 0.59 V (B) 0.92 V (C) 1.90 V (D) 2.13 V The answer is A Thanks
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