What is the molecular formula for ammonium borate?

H₁₂BN₃O₃ is the molecular formula.

I don't know if you understand the concept but you have to find the number of moles in each element and with that you can find the empirical formula. Once you find that, find the molecular mass of the formula and you should be able to find the molecular formula.

I'm assuming you know a little about chem but if you don't let me know.