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1. Maths 3U :D 2. SOR 1 :D 3. Physics 4. Chemistry 5. Maths 4U 6. Belonging 7. Modules

just change the tan2x into its single angle formula and cotx to 1/tanx then just simplify

Yes it is :D

Did the Independent . :mad1:

That is true. Since the 2nd ionisation of Sufluric Acid is reversible. Anyway the qn only asked for a monoprotic acid. In response to the acid qn: If u looked at the example for the weak acid. Did u notice that the heights of the H3O+ and the A- added together to make the remaining height...

Take chem and physics :D

For a monoprotic acid: say the height was 2x starting e.g. HCl --> H+ + Cl- wouldn't the height of the products be x respectively For a diprotic acid: let height be 3x starting e.g. H2SO4 --> 2H+ + SO42- wouldn't height be 2x for H ions and x for SO4 ions

For the ozone monitoring methods: I think you should have put how it actually worked. For the hydrogen/nickel cell: I put the "pissweak voltage" and the source of materials.

I thought that too. But I'm not sure exactly how you would put the answer. What you wrote could be right. :)

100% agree with this!

You are right. Thorium was the product. the question was to find which element underwent beta decay to get thorium

According to the table of standard reduction potentials (given in the CSSA exam) you should have put: H+ + e- --> 1/2 H2

Toast Choc Chip Muffin Sandwich Mandarins Apple Fried Fish

my uncle said this was a good movie. :) Perhaps I should see it .....

I'm using Cambridge. :) is okay

I think when you study, your mind triggers the part of your brain that retains information, that's why you feel like you know the stuff, but... when you do not study, your mind is stressed (normally it should be relaxed), and under stress, the brain cannot function properly. If you study off...

For this: -find asymptotes (vertical) -find the y-intercept (let x=0) -think about domains x < -2 , -2 < x <2 , x > 2 -end of curves approaches the aysmptotes For this: -multiply both sides by the square of the denominator (i.e. (2m)2) -re-arrange, do not cancel 2m from the numerator...

just relax :) take it one step at a time

Chicken Sandwich :) mandarins noodles

brown :)