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we seem to be conflicting on Q4....

think these are right...

yeah NM,... english is really boring atm....

wow, must of taken you for ever to write... are u looking for the answers or the solutions?

sup

is hubris a side effect of the enlightenment.. or is it the romantic sentiment, Passion, mixed with science?

yo

B

make the focus 1,0 and the directices is x=9 use the distance formula(or PS=ePM) to find the distance of the point to the focus and the distance from the point to the line is |9-x|...

$I think it does have something to do with le chatelier.(weak acids are always in equilibrium).. for example:CH_3COOH\rightleftharpoons CH_3COO^- +H^+ $ $according to Le Chaletier's principle, if we increase the concentration of hydrogen ions or $CH_3COO^-$$$ the equilibrium will shift to the...

is that the thickett book??

was thinking of that too, but the percentage of ionisation is a constant value for that acid/base... well at least i think it is... cause the % of ionisation of HCl is always 100%, no questions asked... shouldn't the same apply for weak acids? to the OP: where did u get that statement from:dog:

it does...?

all you need to do for the first one is sub in (x+h) for every x so if f(x)=5x-x^2. f(x+h)= 5(x+h)-(x+h)^2. when you minus the f(x) you just do normal algebra and the other questions are similar

its an exothermic reaction...

just use -log{H+} = pH... and acetic acid ch3cooh isn't made up from 3 H^+ and an OH^-. when it ionises, it becomes CH3COOH<--->CH3COO^- +H^+. but acetic acid doens't completely ionise. if the question tells you that is is like only a 2% ionisation, then you must find the 2% and then use...

you can show ur thanks by +ve repping me lol. but yeah, no probs

lol 2.5 hours isn't bad haha got exams next week :( i need to ace all of them...

i think that this is talking about moles... remember that one mole is exactly 12 grams of carbon 12 (year 11 text book)

lol... should be doing my english essays but <3 chem lol