
import numpy as np

# Coefficients of the cubic equation
coeff = [1, -0.453, 0.0361, -0.00155]

# Solve the cubic equation
roots = np.roots(coeff)

# Filter out complex roots and get the real root
real_root = roots[np.isreal(roots)].real[0]

# The molar volume in dm^3 mol^-1 is equal to the real root
V_m = real_root

print(V_m)

