If a container has a volume of gas measuring at 250 mL, a pressure of 2.1 atm and a temperature of 25 C, what will

If a container has a volume of gas measuring at 250 mL, a pressure of 2.1 atm and a temperature of 25 ºC, what will the new volume be in liters (L) when the pressure is changed to 3.5 atm and 45 º C? 

  Calculate the volume of a canister containing 25 moles of gas with a pressure of 3.4 atm and a temperature of 42 ºC

R= 0.0821