Estimate the amount of nitrogen present in urea? (A) 46 (B) 85 (C) 18 (D) 28

Answer: (A) 46

The chemical formula of urea is NH2– CO- NH2

Let us find the molecular weight of urea

NH2– CO- NH= 4 + (2 × 14) + 16 + 12

Molecular weight of urea = 60 g

60 grams of urea contains 28 grams of nitrogen.

 

\(Percentage\, of\, nitrogen = \frac{28}{60}\times 100\)

 

Percentage of nitrogen = 46.67 %

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