Chemistry Questions Please help 10 pts?

lemme think . .this question lobbed before my eyes unexpectedly as I was on the hunt for something else entirely,but,casting my mind back thirty years,I would have to say that you would want to work out algebraically,the actual number of 'moles' (a standard unit and hence a clue),which,as I see it,from the information here is 'a fair few' . .more specifically,there is a hundredth of a litre of 0.3555mol per litre,so that would suggest to me that the actual number of moles here is 0.003555 mols, a stupidly small number which is nonetheless equivalent to 35/1000 by 'x' strength acid . .find 'x' I suppose . .