Final answer:
The appropriate procedure for finding fugacity using the Virial EOS and Abbott equations is to combine the two.
Step-by-step explanation:
The appropriate procedure for finding fugacity using the Virial EOS (Equation of State) and Abbott equations is to C) Combine the Virial EOS and Abbott equations. The Virial EOS is used to calculate the fugacity coefficients and the Abbott equations are used to relate the fugacity coefficients to the fugacity. By combining these two, you can determine the fugacity of a substance.