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Calculate the mass of urea `(NH_(2)CONH_(2))` required in making `2.5 kg `of `0.25 `molal aqueous solution.

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Calculate the mass of urea (NH2CONH2) required in making 2.5kg of 0.25 molal aqueous solution. Select the correct answer from above options

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Correct Answer - 36.945g Wsol=2.5kg=2.5×1000g=2500g Mw2(NH2CONH2)=14+2+12+16+14+2 =60gmol-1 W1( solvent, H2O)=(Wsol-W2)=(2500-W2)g W2=? Using the formula m= W2×1000 Mw2×W1 0.25= W2×1000 60×(2500-W2) Solve for W2 W2=36.945g

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