Part A What is the pressure in a 24.5-Lcylinder filled with 18.8gof oxygen gas at a temperature of 338K?

Part A

What is the pressure in a 24.5-Lcylinder filled with 18.8gof oxygen gas at a temperature of 338K?  I need the answer in the for of value and units.  p=(value)(units)

Part B

A sample of gas is at a pressure of 1 atm, a volume of 1 L, and a temperature of 25 ∘C. What would happen to the pressure if the volume were reduced to 0.4 L and the temperature increased to 250 ∘C?Express your answer using one significant figure.