How Do You Calculate Pressure of Helium in Different Conditions?

[jvpk4]

Calculate the pressure exerted by 0.3000 mole of He in 0.2000L container at -25.0^o C

a) Using the ideal gas law
b) Using van der Waal's equation (a=0.0341 atmL^2/mol^2 and b = 0.0237 Lmol)

i have no idea how to do this problem?? please helppp

 

[chemisttree]

Start by writing down the two gas laws you are given. Try to understand what the variables in those equations mean and what variables you are given.