1.

In the Duma's method for the estimation of nitrogen , 0.84g of an organic compound gave 448ml of nitrogen at S.T.P. The percentage of nitrogen in the compound is :

Answer»

`33.3%`
`66.7%`
`50.0%`
`60%`

SOLUTION :`22400mL` of nitrogen at S.T.P. WEIGH `=28g`
`448ML` of nitrogen at S.T.P weigh
`=(28)/(22400)xx448=0.56g`
`%` Nitrogen `=(0.56)/(0.84)xx100=66.7`


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