Consider the first-order decomposition of phosgene at a certain temperature. It...

Consider the first-order decomposition of phosgene at a certain temperature.

It is found that the concentration of phosgene is 0.0450 M after 300 seconds and 0.0200 M after 500 seconds. Calculate the following:

(a) the rate constant at the temperature of the decomposition.

(b) the half-life of the decomposition.

(c) the intial concentration of phosgene.