How many moles of gas sample are 5.0 L container at 373K and 203kPa

For the purpose we will here use t he ideal gas law:

p * V=n*R * T

V = 5.0 L

T = 373K

p = 203kPa

R is universal gas constant, and its value is 8.314 J/mol * K

Now when we have all necessary date we can calculate the number of moles:

n=p*V/R*T

n = 203 x 5 / 8.314 x 373 = 0.33 mole