Historically, what have been some of the functions of architecture and construction? (Select all that apply.) to provide functional comforts and shelter to tell the stories of human history to portray the legacies of people of the past to remain distinct from economic conditions

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?