To practice Problem$-$Solving Strategy $18\mathrm{.}1$ Ideal Gases.

Lethal concentrations of gases are often expressed in terms of volume fraction, that is$,$ the fraction of available space occupied by the hazardous gas. A hazardous$-$materials worker wants to calculate the volume fraction of chlorine gas in a storage room after all of the contents of a $0\mathrm{.}800-$LL cylinder of chlorine gas at $107$ atmatm $$is accidentally released in the room. The environment in the storage room is kept at a constant pressure of $1\mathrm{.}00$ atmatm and a constant temperature of $20\mathrm{.}0$C$$C$.$ The room's dimensions are $4\mathrm{.}50$m$7\mathrm{.}50$m$2\mathrm{.}50$m$4\mathrm{.}50$m$7\mathrm{.}50$m$2\mathrm{.}50$m$.$ What is the volume fraction of chlorine gas present in the storage room?