In Dumas method for estimation of nitrogen, 0.50 g of an organic compound gave 70 mL of nitrogen collected at 300 K and 715 mm pressure. The percentage of nitrogen in the organic compound is 
.
(Aqueous tension at 300 K is 15 mm).
Text Solution
Verified by Experts15
(15)
Given data:
Mass of organic compound 
Volume of nitrogen gas 
Temperature 
Total pressure 
Aqueous tension 
Pressure of dry nitrogen 
Convert the volume of nitrogen to STP conditions ( 
):
Using the combined gas law: 
At STP, 22400 mL of 
weighs 28 g.
Mass of 
collected 
Percentage of nitrogen 
Rounding to the nearest integer, we get 15.
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