Why is the total mass always conserved in a chemical reaction? be sure that your explanation includes the discussion of atoms and bonds.

yes the answer is total mass in unchanged   : )

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"