In a Dumas nitrogen estimation method, 0.30 g of an organic compound gave 50 cm^(3) of N_(2) collected at 300 K and 715 mm Hg pressure. Calculate the percentage composition of nitrogen in the compound. (Vapour pressure of water at 300 K is 15 mm Hg)

In a Dumas nitrogen estimation method, 0.30 g of an organic compound g

1.	In a Dumas nitrogen estimation method, 0.30 g of an organic compound gave 50 cm^(3) of N_(2) collected at 300 K and 715 mm Hg pressure. Calculate the percentage composition of nitrogen in the compound. (Vapour pressure of water at 300 K is 15 mm Hg)
Answer» Solution :`P_(1)=715-15=700 mm HG` , `P_(2)=760 mm Hg` `(P_(1)V_(1))/(T_(1))=(P_(2)V_(2))/(T_(2))` `T_(1)=300 K` , `T_(2)=273 K` , `V1=50 cm^(3)` , `V_(2)=?` `V_(2)=(700 xx 50 xx 273)/(300 xx 760)=41.9 cm^(3)` `"% of N"=(28)/(22400) xx 41.9 xx (100)/(W)=17.46%`