In recent years, ozone in the stratosphere has been depleted at an alarmingly fast rate by chlorofluorocarbons (CFCs). A CFC molecule such as CFCh is first decomposed by UV radiation: CFCh - CFCl2 Cl The chlorine radical then reacts with ozone as follows: Cl 03 - ClO 02 ClO 0 - Cl 02 (a) Write the overall reaction for the last two steps. (b) What are the roles of Cl and ClO

i dont know the answe

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.

there are two significant figures.

answer; 4 electrons;