When 6.29 g of a certain nonvolatile solute is dissolved in 500 g of water, the freezing point of the resultant aqueous solution is 0.646oC lower than that of pure water. The cryoscopic constant for water is Kf = 1.856 K-kg/mol. Given this information, what is the molar mass of the solute species?

MCQs on thermodynamics in classical mechanics systems. Topics include the first, second, and third laws of thermodynamics, energy, work, enthalpy, and entropy, spontaneity, chemical potential, equilibrium, phase changes, and chemical kinetics.