45) Calculate the molarity, mass percent and percent by volume of A solution is made by mixing 100.0 g of butanone, CH3COCH2CH3 (molar mass=72.11 g/mol; density= 0.805 g/mL) and 50.0 g methanol, CH3OH (molar mass=32.04 g/mol; density=0.793 g/mL). Start by determining which is the solute and which is the solvent.