A rigid tank contains 2 kmol of N2 and 6 kmol of CO2 gases at 300 K and 15 MPa (Fig. 13–10). Estimate the volume of the tank on the basis of (a) the ideal-gas equation of state, (b) Kay’s rule, (c) compressibility factors and Amagat’s law, and (d) compressibility factors and Dalton’s law.