An unknown substance has a mass of 19.1 g. the temperature of the substance increases by 13.9 degrees celsius when 62.4 j of heat is added to the substance. what is the most likely identity of the substance? the table lists the specific heat capacities of select substances.

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?