How to determine the relative molecular m of amidosulphuric acid by titration of NaOH?

I've done this exp by first weighing the acid 2.5060g and then make a solution of 250.00cm3..n then titrate 21.70cm3 of 0.1240 mol/dm3 NaOH solution into the 25.00cm3 of the acid..now how can i find the relative molecular m of the amidosulphuric acid theorytically and experimentally as i need to compare both value in my report..could anyone help me with this question please?? i need to hand in the report this week..