Explain why the scenario below fails to meet the definition of green construction. Situation: Ap-ex Engineering proposes a design for a 500,000-square-foot wood-sided casino to the Jicarilla Apache in northern New Mexico. It uses a geothermal energy source for heating, cooling, and machine operation, as well as low-water-use appliances.

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?