Recent content by mathemalia

  1. mathemalia

    It's the end...the dawn is upon us

    this whole post just reminds more about Belonging lol
  2. mathemalia

    hardest chem questions

    what's the outcome of the separation?
  3. mathemalia

    Is it just me... HSC overrated?

    I think is overrated because its hard but because its 50%
  4. mathemalia

    Atomic Absorption Spectroscopy (AAS)

    Background: Electron of atoms can absorb electromagnetic energy when they wanna become more 'energetic' and release EM when wanna become less energetic. But ever atom, has different electron configurations and shell numbers, so its absorption of EM waves will be very specific to itself, it'll...
  5. mathemalia

    Chemistry: Anions/Cations Test

    Lead is aloner, he's too fat and (heavy metal) and so is chloride, he bloody smells, no one wants them. so you use them to teach for each other. Barium and calcium are good mates. Sulfates differentiates between their friendship however, making both become very angry and pale white (ppt)...
  6. mathemalia

    Chemistry predictions

    I will be nasty and say 8 marks on a whole titration experiment write up with calculations
  7. mathemalia

    Consequences of special relativity

    Length contraction is a direct consequence of time dilation: Some dude on a platform measures the length of it, l0, then he measures how long it took for some other dude on some fast ass train to cover the length of the platform, the time he measures is not the proper time. Thus, v= l0/tv The...
  8. mathemalia

    How to calculate ppm???

    Very easy my friend. Say you have 50 gram or 50mL (both work) and the mass of phosphates in the solution is 0.05 grams (both have to be expressed as grams or mL ,not one milligrams and the other grams etc), so the ratio becomes: Phosphate : Water 0.05 : 50 So you say okay, what if you i had...
  9. mathemalia

    Post your chemistry questions here.

    You don't have to work with moles, do you? I mean for every 2 units, there is one water condensed out. The first and last units are,however, not connected by both sides. So if they ask for mass for n units of glucose: m(n cellulose)= M(glucose)*n - M(water)*(n-1) ?
  10. mathemalia

    Water quality levels

    Hey there, are we supposed to know the levels that make water of high quality or bad quality. Like for pH, healthy water is 6-8, and dead water is <1. Are we supposed to know all these levels for hardness, salinity etc thanks
  11. mathemalia

    Q9

    ugghh...I didn't integrate =/ 3 marks there.
  12. mathemalia

    Q 10 c (iii)

    I = 10^-12 * e^{0.1L} L =\frac{ln\frac{I}{10^{-12}}}{0.1} If you double I, it becomes 2I: L1 = \frac{ln\frac{2I}{10^{12}}}{0.1} L1 = \frac{ln2 + lnI - ln10^{12}}{0.1} L1 = \frac{ln2}{0.1} +\frac{ ln\frac{I}{10^{-12}}}{0.1}
  13. mathemalia

    Intensity/Decibel question

    I = 10^-12 * e^{0.1L} L =\frac{ln\frac{I}{10^{-12}}}{0.1} If you double I, it becomes 2I: L1 = \frac{ln\frac{2I}{10^{12}}}{0.1} L1 = \frac{ln2 + lnI - ln10^{12}}{0.1} L1 = \frac{ln2}{0.1} +\frac{ ln\frac{I}{10^{-12}}}{0.1} L1 = \frac{ln2}{0.1} + L
  14. mathemalia

    General Thoughts: Mathematics

    just sub P=2(r+theta) for both sides, and you should end up like this 0 < theta < 2pi...(i think)
  15. mathemalia

    General Thoughts: Mathematics

    Thanks for that...and my mentioned quote says ln2/0.1 ... thats what i got from what i remember
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