A mixture of nitrogen and oxygen gases is held in a containe…

A mixture of nitrogen and oxygen gases is held in a container with volume m3. The amount of nitrogen gas in the container is mol. What is the amount of oxygen gas in the unit of mol if the total pressure inside the container is Pa and the temperature of the mixture is K? The gas constant is R = 8.314 J/K mol.

Suppose the top of a dangling chain of length 10 meters is h…

Suppose the top of a dangling chain of length 10 meters is half way down the side of a 40 meter building and has a mass density of 6 kg/m. Find the amount of work (in Joules) it will take to haul the chain up the side of the building to the roof.  Assume the acceleration due to gravity is .