Under similar conditions of pressure and temperature, 40 ml of slightly moist hydrogen chloride gas is mixed with 20 ml of ammonia gas, the final volume of gas at the same temperature and pressure will be

Options

A. 100 mL
B. 20 mL
C. 40mL
D. 60mL

Answer

B

Explanation

`NH_(3(g)) + HCl_((g)) to NH_(4)Cl_((s))`
`{:("t =0","20 mL","20mL", "0"),("t=t","0","20ml","solid"):}`
Final volume = 20 mL