In a beaker, $$50\text{ ml}$$ of a normal HCl solution was taken and $$\mathrm{NH_3}$$ gas was passed through it. The contents were then titrated and required $$60\text{ ml}$$ of semi-normal NaOH solution. How much ammonia was passed through the beaker?

A

0.85 g

B

0.34 g

C

0.51 g

D

0.4 g