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In the dumas method , for the the e...

In the dumas method , for the the estimation of nitrogen , 0.84 g of an oranic compound gave 448 mL of nitrogen at S. T .P the percentage of nitrogen in the compound is ______.

A

`33.3%`

B

`66.7%`

C

`50.0%`

D

`60%`

Text Solution

Verified by Experts

The correct Answer is:
B
22400 mL of nitrogen at S.T.P. weigh
`= 28` g
448 mL of nitrogen at S.T.P. weigh
`= ( 28)/( 22400) xx 448 = 0.56` g
`%` Nitrogen `= (0.56)/( 0.84) xx 100`
`= 66.7`
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