Titration of weak diprotic acid ...?

I titraded the unknown acid with a 1M NaOH soln. Now the molar m of my unkown diprotic acid according to my calculations are about 120-124 grams/mole. According to most sources, oxalic acid(126g/mole) is the closest diprotic acid. Will it be wide to just put the number very close to 126 since will be graded on accuracy? I mean there is no way to go wrong is there? We don't have to show calculations too. This is a 40 pt lab and full credit will almost guarantee me an A in the cl. Please help, need suggestions.