The volume occupied by the chlorine gas at 1 atm pressure is 1.13 L.
The volume is given as the space occupied by the matter. The chlorine gas is considered as ideal, and the space occupied at constant temperature is given as:
P₁V₁ = P₂V₂
The gas at 720 torr pressure occupies 1.2 liter volume, the volume occupied at 1 atm is given as:
1 atm = 760 torr
720 torr × 1.2 L = 760 torr × Volume
Volume = 720 torr × 1.2 L / 760 torr
Volume = 1.13 L
The volume occupied by the chlorine gas at 1 atm pressure is 1.13 L.
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