# A sample of gas in a cylindrical chamber with a removable piston occupied a volume of 6.414 liters when the pressure was 850 torr and the temperature was 27.2 degree C. The Pressure was just readjusted to 4423 torr by moving the piston. ?

Using $P V = n R T$ and knowing that $n R T$ stays constant you should get: ${P}_{1} {V}_{1} = {P}_{2} {V}_{2}$ or $6.414 \cdot 850 = {V}_{2} \cdot 4423$ and ${V}_{2} = 1.232 l i t e r s$