A 43 g sample of urea (mw = 56.7 g mol-1) (non-dissociating, non-volatile solute) is dissolved into 150 g of water. What is the molality of the solution?
a) 1.0 mol/kg
b) 0.76 mol/kg
c) 0.64 mol/kg
d) 1.5 mol/kg