1.

In Dumas's methodof estimation of nitrogen 0.35 g of an organic compound gave 55 ml of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage compositionof nitrogen in the compound would be (Aqueous tension at 300 K = 15 mm).

Answer»

<P>`14.45`
`15.45`
`16.45`
`17.45`

Solution :`(P_(1)V_(1))/(T_(1)) = (P_(2)V_(2))/(T_(2))`, on CALCULATION.
`V_(2) = 46.09 ml`
`%` of `N = (28 xx 46.09 xx 100)/(22400 xx 0.35) = 16.45`


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