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Calculate the mass of nitrogen supplied to the soil by 2.5kg of urea CO(NH2)2. Give answer upto two places of decimal [C=12u, O=16u, N=14u, H=1u].

Question

Calculate the mass of nitrogen supplied to the soil by 2.5kg of urea CO(NH2)2. Give answer upto two places of decimal [C=12u, O=16u, N=14u, H=1u].

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Solution

To calculate the mass of nitrogen supplied to the soil by 2.5kg of urea, we first need to calculate the molar mass of urea and the proportion of nitrogen in it.

  1. Calculate the molar mass of urea (CO(NH2)2): Molar mass of C = 12u Molar mass of O = 16u Molar mass of N = 14u Molar mass of H = 1u

    Urea has 1 carbon atom, 1 oxygen atom, 2 nitrogen atoms, and 4 hydrogen atoms. So, the molar mass of urea is: Molar mass of urea = (112u) + (116u) + (214u) + (41u) = 60u

  2. Calculate the proportion of nitrogen in urea: The proportion of nitrogen in urea = (2*14u) / 60u = 0.467

  3. Calculate the mass of nitrogen in 2.5kg of urea: Mass of nitrogen = 2.5kg * 0.467 = 1.1675kg

So, the mass of nitrogen supplied to the soil by 2.5kg of urea is 1.17kg (rounded to two decimal places).

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