At very high pressures (~ 1000 atm), the measured pressure exerted by real gases is greater than that predicted by the ideal gas equation. This is mainly because
a) such high pressures cannot be accurately measured.
b) real gases will condense to form liquids at 1000 atm pressure.
c) gas phase collisions prevent molecules from colliding with the walls of the container.
d) of attractive intermolecular forces between gas molecules.
e) the volume occupied by the gas molecules themselves becomes significant.
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