Mass of Urea (\( \text{NH}_2\text{CONH}_2 \)) required to be dissolved in \( 1000 \, \text{g} \) of water in order to reduce the vapour pressure of water by \( 25\% \) is _______ \( \text{g} \). (Nearest integer)
Given: Molar mass of N, C, O and H are \( 14 \), \( 12 \), \( 16 \) and \( 1 \, \text{g mol}^{-1} \) respectively.
