C2h4o2

1.how many different atoms are in the compound
2.how many atoms of hydrogen
3.if a big 2 were added in front of the formula what whound that

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.

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