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I think the title says it all... WOOOOOOOO!!! So so awesome to think that I wont every hafta write some crappy essay again... but more than anything I am so excited that the words "creative writing" can now be abolished from my vocabulary... yeeee haaaa! :)

Okay... According to my chemistry teacher, citric acid is CH2COOH-HOCCOOH-CH2COOH... this I am comfortable with! My question is, is citric acid monoprotic or diprotic? AND if someone could give me the equation of its ionisation this would be veeeeeery appreciated thankyou!! LeAsHa :)

Hi could someone please give me a couple of UAI predictions? These are what the HSC marks should turn out to be... UAI 1 (this is the lowest my marks should go) Advanced English - 89/100 - rank 3/69 Extension 1 English - 34/50 - rank 4/9 Mathematics - 89/100 - rank 3/29 Extension 1 Maths...

For finding the sum of an arithmetic sequence, the formula is: Sum = n/2 [2a + (n-1)d], when the first term, difference, and number of terms is known. However, what is the variation of the formula when both the last and first term are known? Is it: Sum = n/2 (2a + l) ? Thanks...