In Dumas’ method for estimation of nitrogen, 0.3g of an organic compound gave 50mL of nitrogen collected at 300K temperature and 715mm pressure. Calculate the percentage composition of nitrogen in the compound. (Aqueous tension at 300K=15 mm)

Options

A. 0.228
B. 0.378
C. 0.428
D. 0.578

Answer

A

Explanation

`V_0 = (732.3 xx 50 xx 273)/(288 xx 760) = 45.67 " mL "`
`" % of " N_2 = (28xx 45.67xx100)/(22,400 xx 0.25)=22.8 `