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(5)/(19)g of an organic compound gave 22...

`(5)/(19)g` of an organic compound gave 22.4 `cm^(3)` of moist nitrogen measured at 280 K and 732.7 mm pressure. The percentage of nitrogen in the substance is approximately (Aqueous tension at 280 K = 12.7 mm)

A

9.8

B

19.6

C

4.9

D

`9.0`

Text Solution

Verified by Experts

The correct Answer is:
A
Pressure of dry nitrogen `= (732.7-12.7) mm = 720 mm`
Volume of nitrogen at NTP `= (720xx22.4)/(280)xx(273)/(760) cm^3`
% of `N = 28/(22400) xx(720xx22.4)/(280)xx(273)/(760)xx(1/(5//19))xx100=9.828%`
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