... 1.00 kg CH3 OH   18.02 g H2O   20.0 g CH3 CH2OH   mol CH3 CH2OH  Molality of CH3 CH2OH =   = 0.434122 = 0.434 m CH3 CH2OH 1.00 kg CH3 OH   46.07 g CH3 CH2OH  The molality of H2O in CH3 OH... H O   32.04 g CH3 OH   kg  Molality of CH3 CH2OH =  22.0 g CH3 CH OH   mol CH3 CH OH   103 g      200 g H O   46.07 g CH3 CH OH   kg  = 2.387671 = 2.39 m CH3 CH2OH The molality... acid, CH3 COOH: Assume exactly 100 g of solution  0.500% CH3 COOH  Mass (g) of CH3 COOH = 100.00 g solution    = 0.500 g CH3 COOH  100% solution   mol CH3 COOH  Moles of CH3 COOH =  0.500 g CH3 COOH