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  1. yoakim

    Chemistry Marathon 2007

    Neighbouring monomers basically means the monomers that react with each other. The functional groups are found on the ends of the neighbouring monomers, eg: the -OH functional group is found on the ends of glocose monomers.
  2. yoakim

    Chemistry Marathon 2007

    It isnt a) since not all condensation polymers are natural, eg: esters can be artificial, and it isn't d) either :P. wrxsti, those other ones I posted up were for sure band 5/6 questions that were harder than normal (hence I posted them up to challenge you guys :P)
  3. yoakim

    changes in the chemical composition of the blood as it passes through the body

    Endocrine glands: increase in hormones in blood Stomach: more water in blood
  4. yoakim

    does annyone know....?

    I don't understand 1). If you do not draw a circle, how can you draw your diagram? Just a whole lot of dots? Also, what is the hp and lp formula? I have never understood this clearly - all those fractions.
  5. yoakim

    Whats the function of the porous barrier?

    A porous barrier for electrolysis prevents the products from touching each other but allows the flow of ions to anode/cathode - that's for electolysis. Basically a porous barrier is permeable/(things can go through it) and can stop other things.
  6. yoakim

    Chemistry Marathon 2007

    ppm: = mg/L 1g = 1mL = 1000mg Therefore, 1 mg = 1/1000mL Therefore, 1mg/L = 1/1000mL per L = 1mL/(1L x 1000) = 1mL/1000L = 1mL/1,000,000mL Hence, 1mL/1,000,000mL = 1ppm :)
  7. yoakim

    Chemistry Marathon 2007

    Chemistry has impacted on society IMMENSELY! The 20th century has seen the birth of three Ages, each with profound social implications. These have been called the Nuclear Age, the Electronic Age and the Chemical Age. The latter is the oldest (beginning ca. 1930), and although its impact has been...
  8. yoakim

    CSSA Bio 07

    I could post it up, but I'm lazy haha, it's a hassle setting up the scanner and all :(.
  9. yoakim

    Chemistry Marathon 2007

    Kony, you're correct for both questions. Great working out there buddy haha. For the CO2 question, this is how I did my working: c = 1.28x10^-5 mol/L, which means 1.28x10^-5 mol in every 1L of air. V = n x MV V = 1.28x10^-5 x 24.79L = 3.173 x 10^-4 L Concentration is 3.173 x...
  10. yoakim

    how much study are you doing a day?

    Been doing about 7-9 hours a day. But that being said, it doesn't feel as if much has been completed...
  11. yoakim

    Chemistry Marathon 2007

    Sorry martyno1, but that's incorrect. I'll answer your question though. The 5 conditions are: 1. Source of a micro-organism which is alcohol-tolerant eg:Yeast. Yeast can undergo anaerobic respiration to form CO2, which is an indication (with its reaction with Ca(OH)2) of the formation of...
  12. yoakim

    Ecumenical movements...

    I dont think 'impact' is a verb in the syllabus, but it could be answered nonetheless... For the NSW ecumenical one, a generalised 'impact' would be: It initiates and supports local inter-church groups and networks and brings these groups together, provides opportunities for people to reflect...
  13. yoakim

    comparing the religious and non-religious

    Ok, well the first dot point basically refers to the nature of humanity - how they came about and their spiritual nature - how they relate to God. My sample response is this: ii) Christians believe that their human race has been created in the “image and likeness” of God as stated in...
  14. yoakim

    Inner Peace - Islam

    Mmmm, meditation is a very good example because you can bring in the different variants for Islam - I find that the hardest thing to do, the only variant I have for Islam is Sufism, but that's for world peace...none for Inner peace. In what you have wrote, there is a balance between mind...
  15. yoakim

    someone fill me in

    Basically, a threshold is a limit or a certain strength of a stimulus that is detected by the receptor cells (about -50mV) to achieve an action potential (-70mV). If it has been achieved, an action potential (electrochemical impulse) is formed, which is electrical changes caused by sodium ions...
  16. yoakim

    Trial Question.. ! HELP

    A cochlear implant is a small, complex electronic device that can help to provide a sense of sound to a person who is profoundly deaf or severely hard of hearing. It bypasses damaged parts of the inner ear and electronically stimulates the auditory nerve. Part of the device is surgically...
  17. yoakim

    Help please.

    Also, it's much harder for cones to get stimulated by the light to create an electrochemical signal to the neurones. However, rods are VERY SENSITIVE TO LIGHT hence their suitability in darkness where there is little light. A good practical example is this: During night, when you try to look...
  18. yoakim

    i need help!

    Ok...this is all from the top of my head, apologies if there are slight inconsistencies. 1. (Wikipedia :D): pheromones are chemicals emitted by living organisms to send messages to individuals of the same species. (I don't think we need to know these in depth, but just a general idea)...
  19. yoakim

    come on chem chums

    So basically, you know the numbers in front of a balanced chemical equation right, adding water doesn't affect that, but affects the CONCENTRATION of the solution. ie: adding water into an HCl solution makes it DILUTE, but it does not become a weak acid.
  20. yoakim

    Chemistry Marathon 2007

    Eutrophication is a natural process where water bodies receive excess nutrients that stimulate excessive plant growth - eg discharge of nutrients, such as phosphates and nitrates. Algal bloom is associated with it which is the excessive growth of algae or other aquatic organisms in a waterway...
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