How many moles of Na, are in a flask with a volume of 450 mL at a pressure of 580.0 kPa and a temperature of 330.0 K?*

answer; /// i do believe that the correct answer is (a) boiling

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.