A0.50g sample of ag2so4(s) is added to a beaker containing 0.150 l of 0.025 m bacl2. describe the final contents of the beaker (masses of any precipitates and concentrations of all of the ions in solution).

the answer is

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.

10 years is the answer