A refrigeration tank holding `5.00 L` feron gas `(C_(2)Cl_(2)F_(4))` at `25^(@)C` and `3.00 atm` pressure developed a leak. When the leak was discovered and repaired, the tank has lost `76.0 g` of the gas. What was the pressure of the gas remaining in the tank at `25^(@)C`?

Explanation

Original gas pressure
`n=(PV)/(RT)=(3.00atmxx5.00mL)/(0.082xx348)`
`=0.613 mol=0.613xx171 g`
`=105 g` originally present
Quantity remaining
`105-76=29 g=(29)/(171)=0.17 mol`
`P=(nRT)/(V)=(0.17xx0.082xx298)/(5.00 L)=0.83 atm`