Asample of gas occupies a volume of 1025ml at 75c and 0.75atm. what will be the new volume if temperature decreases to 35c and pressure increases to 1.25atm?

544.34 mL

That is;

in our case we are given;

Initial volume, V1 = 1025 mL

Initial temperature, T1 = 75 °C (But K = °C + 273.5)

                                    = 348.5 K

Initial pressure, P1 = 0.75 atm

New temperature, T2 = 308.15 K (35°C +273.15)

New pressure , P2 = 1.25 atm

We are required to calculate the new volume, V2

Replacing the known variables in the equation of combined gas law we can find the new volume;

Therefore, the new volume is 544.34 mL