[lily_m]

hello, i was wondering could someone help me with a problem i have encountered in my % yield for p-Nitrochlorobenze. the experiment involved the formation of a nitronium ion (nitric acid with sulphuric acid) with chlorobenzene to form p-Nitrochlorobenzene (69%), o-Nitrochlorobenzene (30%) and m-Nitrochlorobenzene (1%). after the recrystallized product (nitrochlorobenzene) was collected it weighted in at 0.02grams. the equation was a 1:1, therefore the theoretical yield is 0.0142 moles.
the problem i have encountered is that i cannot get the gmm for nitrochlorobenzene in total. i need this in order to find the number of moles of the product. i only have the gmm for p-nitrochlorobenzene, o-nitrochlorobenzene and m-nitrochlorobenzene consecutively. should i add these up and find the mean in order to gain the gmm as a whole?

[macman104]

gmm?

[lily_m]

oh, sorry. the gmm is molecular weight

[macman104]

The molecular weight of nitrochlorobenzene does not depend on whether it is o, m or p nitrochlorobenzene, they all weigh the same.

If you want the moles that 0.02 grams is, just divide by the molecular weight of nitrochlorobenzene (it doesn't matter which one, they're all the same).

[lily_m]

thank you very much