[JimJo]

In a titration, 16.02 mL of 0.100M NaOH was required to titrate 0.2011 g of an unknown acid, HX. What is the molar mass of the acid?

I got the moles by turning 16.02 to liters and multiplying it by the 0.100M NaOH, and then i am stuck.

Please help.

[Arkcon]

From the tiny hint they're giving you, you know this is a monoprotic (that's one hydrogen) acid.  So a balanced equation would tell you nothing you don't already know.  (There's no reason you can't write one out just for fun.) You've got mls of a certain conc. of NaOH, how many moles is that?  And how many moles of acid is consumed?  And you have the grams of acid, so can you calculate molar mass?