What mass of solid that has a molar mass of 46 point 0 g/mol should be added to 150 point 0 g of benzene to raise the boiling point of benzene by 6 point 2 8 times degree C ? (The boiling point elevation constant of benzene is 2 point 5 3 times degree C times kg/mol ) Use triangle cap t sub b is equal to cap k sub bm