Mass of urea required to be dissolved in 2² of water in order to reduce the vapor pressure of water by _______ g. (nearest integer) Given: molar mass of N, C, O, and H are ______ₐnd respectively.
a) 36; 28, 12, 16, 1
b) 18; 14, 6, 8, 1
c) 9; 7, 3, 4, 1
d) 72; 56, 24, 32, 2
