If 300 Mmol HCl(g)is Added to 1

Multiple Choice

If 30.0 mmol HCl(g) is added to 1.00 L of a buffer that is 0.340 M NH₃(aq) and 0.290 M NH₄Cl(aq) ,what are the final concentrations of NH₃(aq) and NH₄Cl(aq) ,respectively? Assume no volume change.

A) 0.310 M and 0.320 M
B) 0.310 M and 0.290 M
C) 0.370 M and 0.290 M
D) 0.370 M and 0.320 M