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Calculate the mass of urea (NH2CONH2) required in making 2.5 kg of 0.25 molal aqueous solution. |
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Answer» 0.25 molal aqueous solution of urea means that 0.25 mole of urea are present in 1 kg of water Thus; 1.015 kg of solution contain urea = 15g×2.5kg of solution will require urea \(\frac{15g}{1.015kg}\times2.5kg=37g\) |
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