Hi all. I'm new to the forums and am looking forward to contributing. At the moment, i'm having trouble figuring out this chemistry problem i have for homework. The United State's gas and oil supplies are shrinking and are now using the electrolysis of water as a source of energy. The source of electricity is from photovoltaic (PV) conversion of sunlight in the southwestern US. (a) Assume that a flat plate PV system is used, with a solar conversion efficiency of 20 percent and a hydrogen production efficiency of 100 percent. Assume the average annual insolation in the southwest is 270 watts per square meter. Calculate the annual electrical energy produced in kJ/sq. meter. Calculate the weight of hydrogen (kg/sq. meter) produced per year. (b) The US consumed 44 EJ of petroleum in 2000. How many square meters of PV collectors would be needed to supply the equivalent amount of energy in hydrogen?