Using a balanced chemical reaction and a periodic table, which of the following is not possible to calculate?
a. the molar mass of the products
b. the number of atoms in the reaction
c. the number of molecules in the reaction
d. the amount heat produced in the 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.