Sorry to interfere, but would the graph look like this?

x

Ok thanks, that would make sense.

I was thinking the same question as Raderford.

How should we go about drawing the graph of n(AB)? We'll draw (x,n(AB)) but the first question is, is it a sketch or a plot? I assume since there are no quantitative calculations it is a sketch.

I'm thinking this graph will be S-shaped where x is between 1 and infinity, and then a direct reflection of the S-shape between 1 and infinity is there between 0 and 1 (squashed down a lot more, obviously). We know there will be reflection at x=1 due to the symmetry of the reagent excess. The S will reach its peak at yield=100% when x tends to infinity - and its minimum when x=1 (calculation suggests about 50% of each reactant will get converted to products at equilibrium, so we will get around 50% yield as well) is 50%?