Chemistryhard · Past Paper
What is the percentage by mass of Nitrogen in Urea [NH2CONH2]? (N=14, H=1, C=12, O=16)
A46.6%
B28.0%
C33.3%
D60.0%
✓ Correct Answer: A — 46.6%
Total mass = 60. Mass of N = 28. (28/60)*100 = 46.6%.
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