An acrylic beaker (with a coefficient of linear expansion of 6.8x10^-5 â°C^-1 ) is filled wuth mercury at 25â°C, thus having a capacity of 500 mL. It is then cooled down to 15â°C. Calculate the mass of mercury, measured at 15â°C, that must be added to make the beaker completely full. Consider the coefficient of linear expansion of mercury is 1.82x10^-4 â°C^-1 and its density at 0â°C is 13.6 g/cm^3.