9.The molar volume of a perfect gas at 500 K and 100 bar is 0.416 . The molar volume of CO₂ under the same conditions is 0.366 . Which interaction dominate the CO₂ behavior at 500 K?
(A) repulsive forces
(B) attractive forces
(C) van der Waals forces
(D) electronic forces
(E) none of the above answer is correct

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