(c) a container is filled with a mixture of helium (light molecules) and oxygen (heavy molecules) gases. a thermometer in the container reads 22°c. which gas molecules have the greater average kinetic energy

Neither. A basic postulate of the Kinetic Molecular Theory is that the molecules of all gases at the same temperature have the same average kinetic energy.

answer; economic order quantity;

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.