Ideal or Perfect Gas Law?

Question

A standard gas cylinder has a volume of about 30.0 L. If the gas is stored under a pressure of about 1.610 x 104 kPa at 25.00 °C, how many moles of gas are contained in the cylinder assuming ideal gas

behavior? What would be the mass in kilograms of the nitrogen gas in its standard state of aggregation in such a cylinder? Use the appropriate number of significant figures.

Answer 1

p = 0.1589 atm

T = 298.15 K

n = pV / RT = 0.1589 x 30.0 / 0.0821 x 298.15 = 0.195