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So close, Gussy! You have mostly the right process. Firstly, Calcium has a valency of -2, so the formula is CaCl2. Therefore the number of moles (what you actually want to find) of calcium chloride is 5.3/(40.08+2*35.45)=0.048 Then you take your Q or quantity of heat (3570) and divide it by the...

It's actually page 226, in 4th edition. note that it is 34 a) and that the question says the water is at 18.6°C, not 18.6 g. The question as written in my book is: 34 Calculate the molar heat of solution for the ionic substance involved in each of the following experiments which were carried...

Hey! I'm going; I was Dux of Year 10 at Canberra Grammar School last year and was invited to the award ceremony (for a book voucher :P) I know the awards are held on 30 April 2009, but I have no details as to the place or time; does anyone know?

I read in the ACER booklet that UMAT is only available in year 12, and to do it in year 11 could result in disqualification. Talking to certain peers however, I hear of people doing UMAT in both years 11 and 12 and then being able to select the better score out of the two tests. So which is it...