Ammonia (NH₃) Is a Weak Base That Reacts with a Strong

Ammonia (NH₃) is a weak base that reacts with a strong acid to form the ammonium ion, NH₄⁺. If 5.00 mL of a solution of an ammonia cleaner is titrated directly with 42.6 mL of 0.5000 M HCl, what is the concentration of the NH₃ in solution? (Assume that the ammonia is the only solute that reacts with the acid.)

A) 0.0587 M
B) 0.107 M
C) 4.26 M
D) 1.07 M
E) 5.87 M