1) Is it true that if you do not identify what you are doing in your working out you will not get marks for the question unless its really obvious (so how far will examiners look for partial marks in your working)?
2) Do you sometimes 'flagpost' your different steps and what you are doing in questions?
3) Is it true that if you do include units in your working out, you will lose marks. if this is true, is it only for when you have not got the end answer correct?
1) the exam paper explicitly says "show working", so its better to set your working out to get the full mark. if your final answer is wrong but working order is correct, partial marks are given. the examiners have a marking scheme which states certain steps/calculations must be shown - these are where marks are given [check past examiners reports!]
2) by "flagposting", you can first write the formula (e.g. n = cV) and then put in the relevant numbers in the next line. examiners will then know what you are doing
3) i don't see any reason why you would include units in your working (??) - you only need to include units for your final answer in EACH calculation. but im sure they wouldnt take marks off for including them (?)
P.S. Remember to give your final answers in the
correct number of significant figures - examiners care about this more than the above points.
hope this helps =]