Small pieces of copper at 100.0°C are placed in 110.0g of water at 25.0°C in a perfectly insulated calorimeter. The water and copper reach the same final temperature. The initial and final temperatures of the water are shown. The heat capacity of water is 4.18J/(g⋅°C). How much heat is transferred during the experiment?

A 220J

B 230J

C 460J

D 920J

920J

D

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?