The refractive index, n of a polymer was determined as a function of temperature. The results are given in the table. Determine the glass transition temperature of the polymer. T/°C 20 30 40 50 60 70 80 90 100 110 120 130 n 1.5913 1.5898 1.5883 1.5868 1.5853 1.5838 1.5822 1.5801 1.5766 1.5725 1.5684 1.5643

High-pressure liquid chromatography (hplc) is a method used in chemistry and biochemistry to purify chemical substances. the pressures used in this procedure range from around 500 kilopascals (500,000 pa) to about 60,000 kpa (60,000,000 pa). it is often convenient to know the pressure in torr. if an hplc procedure is running at a pressure of 1.03×108 pa , what is its running pressure in torr?