Achemist hypothesizes that mercury oxide (hgo) will undergo a decomposition reaction if it reaches a certain temperature. when the chemist designs his experiment, what should be the only independent variable?

false

because it does not have the potential to be entirely used up

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.