Chemistry
What is the mass of nitrogen in 1000 kg of urea [CO(NH2)2].
[C = 12] (Answer to the nearest kg.)
Stoichiometry
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Answer
Molecular weight of urea [CO(NH2)2]
= 12 + 16 + 2[14 + 2(1)]
= 12 + 16 + 2[16] = 28 + 32
= 60 g
Converting given weight of urea in grams,
1000 kg of urea = 1000 x 103 g of urea
60 g of urea contains 28 g of nitrogen
∴ 1000 x 103 g of urea will contain = x 1000 x 103 = 466.66 x 103 g ≈ 467 x 103 g = 467 kg of nitrogen.
Hence, mass of nitrogen is 467 kg
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