Question

Urea is a very important nitrogenous fertilizer. Its formula is CON2H4. Calculate the percentage of carbon in urea.

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Answer 1

Answer:

20%

Explanation:

mass of urea 60

Mwt of c is 12

12÷60×100 ≈20

∴20%

Answer 2

urea=> NH2-CO-NH2  

total mass=60

mass of nitrogen = 14, 2 molecules hence m=28

N%= mass of nitrogen X 100

       mass of urea

    = 28  X 100

       60

    N%= 46.6%