In addition to identifying the reactants and products, a thermochemical reaction equation provides

C

Explanation:

the change in enthalpy can be found in adding the enthalpies of the individual thermochemical reactions of a chemical reaction

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.