According to Avogadro's hypothesis,one mole of every substances occupy 22.4 litres.

 

if we measure the volume of 17 gm of ammonia will it occupy such????

not precisely. only a perfect gas will occupy 22.4 litres at STP.

 

ammonia is not a perfect gas. the closest we have is helium.

 

the volume occupied also changes with temperature, and pressure. so if atmospheric conditions are not standard where the experiment is caried out then you will get a different volume.

if we measure the volume of 17 gm of ammonia will it occupy such????

Try that your self:

 

[math]V=\frac{m}{M}\times V_m[/math]

 

m=mass

M=molar masss

[math]V_m=22.41\frac{mol}{dm^3}[/math]