M$4$a$.$I$1$

The pressure gauge on a $2\mathrm{.}0m^3$ tank of nitrogen at $20C$ reads $\frac{1500}{b}ar.$ Estimate the mass of nitrogen in the tank using $($a$)$ the ideal gas equation of state and $($b$)$ Soave$-$Redlich$-$Kwong $($SRK$)$ equation of state. Which approach is more accurate? Include a brief explanation.