The difference in density between gases creates buoyancy, which is the ability of an object to float. at 0°c, helium has a density of 0.18kg/m 3. at 0°c, regular air has a density of 1.29 kg/m 3. in kilograms, how much mass can a cubic meter of helium float in regular air at 0°c?

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?