Two beakers are places in a closed container, beaker A initially contains 0.15 mole of naphthalene C10H8 in 100g benzene c6h6, and beaker b contains 31g of unknown compound dissolved in 100g benzene. At equilibrium, beaker a lost 7.0g. Define what will happen for the system to be equilibrium, and calculate the molar mass of the unknown and state any assumption