Chlorine monoxide accumulates in the stratosphere above Antarctica each winter and plays a key role in the formation of the ozone hole above the South Pole each spring. Eventually, CIO decomposes according to the equation: 2CIO(g) rightarrow CL_2(g) + O_2(g) The second-order rate constant for the decomposition of CIO is 6.75 times 10^9 M^-1 s^-1 at a particular temperature. Determine the half-life of CIO when its initial concentration is 1.25 times 10^8 M.