Answer the following question:

The pressure of a gas is reduced from 1275 mm Hg to 875 mm Hg by moving a piston from 60 mL to 450 mL. What is the final temperature of the gas if the original temperature was 780C? :iK An air bubble released by a deep-water diver, 120 m below the surface of a lake, has a volume of 1.30 cm3. The surface of the lake is at sea level, and the density of the lake water can be approximated as that of pure water. As the bubble rises to the surface, the temperature of the water and the number of air molecules in the bubble can each be approximated as constant. Find the volume (in cm3) of the bubble just before it pops at the surface of the lake. :W Gas is contained in a 9.00-L vessel at a temperature of 21.0C and a pressure of 7.00 atm. (a) Determine the number of moles of gas in the vessel. (b) How many molecules are in the vessel? You drop an ice cube into an insulated container full of water and wait for the ice cube to completely melt. The ice cube initially has a mass of 60.0 g and a temperature of 0C. The water (before the ice cube is added) has a mass of 720 g and an initial temperature of 30.0C. What is the nal temperature (in C) of the mixture? (Assume no energy is lost to the walls of the container, or to the environment.) |:]c