Chemistry
Grade-9
Easy
Question
Percentage of ‘N’ in urea?
- 46.96
- 49.65
- 46.85
- 46.5
Hint:
Chemical formula of urea is NH2CONH2.
The correct answer is: 46.96
Chemical formula of urea is NH2CONH2.
Molecular weight of urea = (14 + 2 + 12 + 16 + 14 +2) = 60g
Amount of nitrogen in urea = 28g
Percentage of ‘N’ in urea = (28
60) = 46.96 %
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