Questions asked
Assuming that sunlight produces 3.066×1022 ???????? ????????????????????????? ????2????? , and the skin absorbs 50% of these photons (and reflects the other 50%) calculate the total UV energy absorbed over 0.42 m2 of skin that is exposed to sunlight for one hour. Assume that the average wavelength of the UV photons is 330 nm.
Dominique Jan Tan
Numerade educator
The heat of vaporization of water at 373 K is 40.7 kJ/mol. Find q, w, ?E, and ?H for the evaporation of 454 g of water at this temperature at 1.00 atm?
The radius of a xenon atom is 1.3 × 10-8 cm. A 100.0 mL flask is filled with Xe at a pressure of 1.0 atm and a temperature of 273 K. Calculate the fraction of the volume that is occupied by Xe atoms.
An important reaction that takes place in a blast furnace during the production of iron is the formation of iron metal and carbon dioxide from iron(iii) oxide and carbon monoxide. Determine the mass of iron(iii) oxide required to form 910 kg of iron. Determine the amount of carbon dioxide that forms in this process.