Calculate to one decimal place, the minimum mass of zinc that must be added to react with all sulfate
(relative atomic mass: Zn = 65)
2

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

sup bro, im dumb, but this is what i found xd

"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"