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Chemistry Organic A2 isa help

I have my chemistry a2 isa coming up in a week and I have been told almost nothing about what it is on. All I was told about was that it was on organic chemistry and that I should revise organic chemistry. Can any one help me out? Please pm me
Thanks anyway :biggrin:

Reply 1

anniyan98

I have my chemistry isa afta the holidays. if it is organic chemistry, then I am out of luck for my isa because I have no clue about the organic side.

Reply 2

zcarter1

i know this is a totally random thread, but i cant find one on % error, i have a question where measurements are take;
Mass of crucible/g 14.12g
Mass of crucible+ Ca(NO2)2 .XH20 15.00
Mass of crucible+ CaO residue/g 14.41

error of each measurement is +/- 0.01

i know the general formula; error/ reading X 100
but which reading do i take and do i then X3 or X2 as he's taken more than one reading?
Im so confused and i have an exam on it today, any help is greatly apprciated <3