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  1. R

    HSC mathematic 2009?

    Here you go :) : http://www.itute.com/wp-content/uploads/2009-nsw-bos-mathematics-solutions.pdf
  2. R

    multiple choice questions

    Hmmm...I think these are the answers.
  3. R

    Weak Acids

    Thanks dude ! :)
  4. R

    Weak Acids

    Yeah, it is.
  5. R

    Weak Acids

    Umm I got it from Jacaranda.
  7. R

    Weak Acids

    *bump*
  8. R

    Weak Acids

    Why does the degree of ionisation of weak acids decrease with increasing concentration? Thanks in advance.
  9. R

    10 Mary Street

    10 Mary Street For nineteen years We departed Each morning, shut the house Like a well-oiled lock, Hit the key Under a rusty bucket: To school and work - Over that still too-narrow bridge, Around the factory That was always burning down. Back at 5p.m. From the polite hum-drum Of washing...
  10. R

    Bachelor of Design

    4802 | College of Fine Arts UNSW Handbook Program - Design - 4802 How to Apply for an Undergraduate Course | College of Fine Arts
  11. R

    HSC Independent and CSSA Papers

    Can anyone who has HSC Independent Papers for Engineering Studies (Year 12) upload them please? Thanks in advance.
  13. R

    lol hey !

    lol hey !
  14. R

    Chem-engineering question

    Umm from what I've learnt, concentration cells are a type of galvanic cell due to the generation of electricity from the reaction alone. In the case of a concentration cell,there is a differing level of electrolyte concentrations in two regions. The cathodic region occurs where the concentration...
  15. R

    Do you think it's better to write the risk assessment before or after the method?

    Yeah, I agree with the before the method approach since you have to know what you are working with and what potential dangers you may face while using the chemicals. Usually I'm told that the risk assessment is placed after the aim though.
  16. R

    Galvanic Cells

    How would I calculate the voltage produced for the galvanic cell in the attached image? Thanks in advance.
  17. R

    Question on Locus and Parabola

    Oops, my bad. Thanks for the correction. It's been a while since I've done this topic. ^^"
  19. R

    Question on Locus and Parabola

    Convert quadratic equation to general form: y = x^2<sup> </sup> + 6x + 5 y - 5 = x^2 + 6x y - 5 + 9 = x^2 + 6x + 9 y + 4 = (x+3)^2 (i.e. the general form of a parabola 4a(y - k) = (x - h)^2 Vertex: From the general form the parabola, the vertex is given as (h, k). Hence the vertex is (-3, -4)...
  20. R

    Post paper

    Here you go. =)
  21. R

    Were is that thread with the links to download the Chem textbooks?

    http://community.boredofstudies.org/17/chemistry/224298/chemistry-textbook-resources.html
  22. R

    parametrics

    The general form of a parabola with vertex (0,0) is x2 = 4ay. Therefore: 4a = 1 a = 0.25 For the parametric equations, sub a = 0.25: x = 2at x = 0.5t - (A) y = at^2 y = 0.25t^2 - (B) Sub t(1) in (A) and (B). This will form an x-ordinate and y-ordinate (i.e. a set of co-ordinates) Sub...
  23. R

    systematic name

    Yes styrene is the common name for phenylethene. As for polystyrene, the IUPAC name for it is polyphenylethene.
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