PLEASE HELP!!! titration problem

calculate the mass of NH3 needed to neutralize 30.00 ml of a 2.5 M solution of HNO3.

Please help!

Atomic weights: N=14, H=1, NH3=17

NH3 + HNO3 ===> NH4NO3

Let the solution be called S.

30.00mLS x 2.5molHNO3/1000mLS x 1molNH3/1molHNO3 x 17gNH3/1molNH3 = 1.3g NH3 to two significant figures